diff --git a/src/warchron/controller/controller.py b/src/warchron/controller/controller.py
index 46ef82f..64a4c9a 100644
--- a/src/warchron/controller/controller.py
+++ b/src/warchron/controller/controller.py
@@ -10,14 +10,14 @@ from warchron.view.view import PlayerDialog, WarDialog, CampaignDialog, Objectiv
 
 class Controller:
     def __init__(self, model: Model, view: View):
-        self.model = model
-        self.view = view
+        self.model: Model = model
+        self.view: View = view
         self.current_file: Path | None = None
-        self.selected_war_id = None
-        self.selected_campaign_id = None
-        self.selected_round_id = None
+        self.selected_war_id: str = None
+        self.selected_campaign_id: str = None
+        self.selected_round_id: str = None
         self.view.on_close_callback = self.on_app_close
-        self.is_dirty = False
+        self.is_dirty: bool = False
         self.__connect()
         self.refresh_players_view()
         self.refresh_wars_view()
@@ -165,26 +165,24 @@ class Controller:
         self.view.display_campaign_participants(participants_for_display)       
 
     def _fill_round_details(self, round_id: str):
-        index = self.model.get_round_index(round_id)
-        self.view.show_round_details(index=index)
-        camp, rnd, participants, sectors = self.model.get_round_choices_data(round_id)
-        rows = []
+        rnd = self.model.get_round(round_id)
+        camp = self.model.get_campaign_by_round(round_id)
+        self.view.show_round_details(index=camp.get_round_index(round_id))
+        participants = self.model.get_round_participants(round_id)
+        choices_for_display = []
         for part in participants:
-            player = self.model.get_player(part.id)
             choice = rnd.get_choice(part.id)
-            priority_name = ""
-            secondary_name = ""
-            if choice and choice.priority_sector_id:
-                priority_name = self.model.get_sector(choice.priority_sector_id).name
-            if choice and choice.secondary_sector_id:
-                secondary_name = self.model.get_sector(choice.secondary_sector_id).name
-            rows.append({
-                "participant_id": part.id,
-                "participant_name": player.name,
-                "priority": priority_name,
-                "secondary": secondary_name,
-            })
-        self.view.display_round_choices(rows)
+            if not choice:
+                choice=self.model.create_choice(round_id=rnd.id, participant_id=part.id)
+            priority_name = camp.get_sector_name(choice.priority_sector_id) if choice else ""
+            secondary_name = camp.get_sector_name(choice.secondary_sector_id) if choice else ""
+            choices_for_display.append((
+                self.model.get_player_name(part.id),
+                priority_name,
+                secondary_name,
+                choice.participant_id
+            ))
+        self.view.display_round_choices(choices_for_display)
 
     def on_tree_selection_changed(self, selection):
         self.selected_war_id = None
@@ -578,6 +576,8 @@ class Controller:
         self.is_dirty = True
         self.refresh_and_select(RefreshScope.WARS_TREE, item_type=ItemType.ROUND, item_id=rnd.id)
 
+# Choices methods
+
     def edit_round_choice(self, choice_id: str):
         round_id = self.selected_round_id
         if not round_id:
@@ -586,11 +586,13 @@ class Controller:
         choice = rnd.get_choice(choice_id)
         if not choice:
             return
-        participant = camp.participants[choice.participant_id]
+        part = camp.participants[choice.participant_id]
+        player = self.model.get_player(part.id)
+        part_opt = ParticipantOption(id=player.id, name=player.name)       
         dialog = ChoicesDialog(
             self.view,
-            participants=[participant],
-            default_participant_id=participant.id,
+            participants=[part_opt],
+            default_participant_id=part.id,
             sectors=sectors,
             default_priority_id=choice.priority_sector_id,
             default_secondary_id=choice.secondary_sector_id,
@@ -598,7 +600,8 @@ class Controller:
         if dialog.exec() != QDialog.DialogCode.Accepted:
             return
         rnd.set_choice(
-            participant_id=participant.id,
+            participant_id=part.id,
             priority_sector_id=dialog.get_priority_id(),
             secondary_sector_id=dialog.get_secondary_id(),
-        )
\ No newline at end of file
+        )
+
diff --git a/src/warchron/model/campaign.py b/src/warchron/model/campaign.py
index 9c36808..4a66536 100644
--- a/src/warchron/model/campaign.py
+++ b/src/warchron/model/campaign.py
@@ -1,7 +1,7 @@
 from __future__ import annotations
 from uuid import uuid4 
 
-from warchron.model.round import Round
+from warchron.model.round import Round, Choice, Battle
 
 class Campaign:
     def __init__(self, name: str, month: int):
@@ -10,7 +10,7 @@ class Campaign:
         self.month: int = month
         self.participants: dict[str, CampaignParticipant] = {}
         self.sectors: dict[str, Sector] = {}
-        self.rounds = []
+        self.rounds: list[Round] = []
         self.is_over = False
 
     def set_id(self, new_id: str):
@@ -72,6 +72,8 @@ class Campaign:
         part.set_theme(theme)
 
     def remove_campaign_participant(self, player_id: str):
+        # TODO manage choices referring to it
+        # TODO manage battles referring to it
         del self.participants[player_id]
 
 # Sector methods
@@ -81,12 +83,18 @@ class Campaign:
         self.sectors[sect.id] = sect
         return sect
 
-    def get_sector(self, id: str) -> Sector:
-        return self.sectors[id]
+    def get_sector(self, sector_id: str) -> Sector:
+        return self.sectors[sector_id]
+    
+    def get_sector_name(self, sector_id: str) -> str:
+        if sector_id is None:
+            return ""
+        return self.sectors[sector_id].name
 
     def get_all_sectors(self) -> list[Sector]:
         return list(self.sectors.values())
 
+    # TODO manage choices referring to it (round order!)
     def update_sector(self, sector_id: str, *, name: str, round_id: str, major_id: str, minor_id: str, influence_id: str):
         sect = self.get_sector(sector_id)
         sect.set_name(name)
@@ -96,6 +104,8 @@ class Campaign:
         sect.set_influence(influence_id)
  
     def remove_sector(self, sector_id: str):
+        # TODO manage choices referring to it
+        # TODO manage battles referring to it
         del self.sectors[sector_id]
 
 # Round methods
@@ -104,7 +114,10 @@ class Campaign:
         return any(r.id == round_id for r in self.rounds)
     
     def get_round(self, round_id: str) -> Round:
-        return self.rounds[round_id]
+        for rnd in self.rounds:
+            if rnd.id == round_id:
+                return rnd
+        raise KeyError(f"Round {round_id} not found")
 
     def get_all_rounds(self) -> list[Round]:
         return list(self.rounds)
@@ -135,6 +148,16 @@ class Campaign:
                     return rnd.name
             return ""
 
+# Choice methods
+
+    def create_choice(self, round_id: str, participant_id: str) -> Choice:
+        rnd = self.get_round(round_id)
+        return rnd.create_choice(participant_id)
+
+    def remove_choice(self, round_id: str, participant_id: str) -> Choice:
+        rnd = self.get_round(round_id)
+        rnd.remove_choice(participant_id)
+
 class CampaignParticipant:
     def __init__(self,player_id: str, leader: str, theme: str):
         self.id: str = player_id # ref to War.participants
diff --git a/src/warchron/model/model.py b/src/warchron/model/model.py
index 4ed5087..85713a6 100644
--- a/src/warchron/model/model.py
+++ b/src/warchron/model/model.py
@@ -6,7 +6,7 @@ from datetime import datetime
 from warchron.model.player import Player
 from warchron.model.war import War, Objective, WarParticipant
 from warchron.model.campaign import Campaign, Sector, CampaignParticipant
-from warchron.model.round import Round
+from warchron.model.round import Round, Choice, Battle
 
 class Model:
     def __init__(self):
@@ -76,6 +76,7 @@ class Model:
         return list(self.players.values())
 
     def remove_player(self, player_id: str):
+        # TODO manage war_participants referring to it
         del self.players[player_id]
 
 # War methods
@@ -100,6 +101,22 @@ class Model:
                     return war
         raise KeyError(f"Campaign {campaign_id} not found in any War")
 
+    def get_war_by_sector(self, sector_id: str) -> Campaign:
+        for war in self.wars.values():
+            for camp in war.campaigns:
+                for sect in camp.sectors.values():
+                    if sect.id == sector_id:
+                        return camp
+        raise KeyError(f"Sector {sector_id} not found in any War")
+
+    def get_war_by_round(self, round_id: str) -> Campaign:
+        for war in self.wars.values():
+            for camp in war.campaigns:
+                for rnd in camp.rounds:
+                    if rnd.id == round_id:
+                        return camp
+        raise KeyError(f"Round {round_id} not found in any War")
+
     def get_war_by_objective(self, objective_id: str) -> War:
         for war in self.wars.values():
             for obj in war.objectives.values():
@@ -107,6 +124,7 @@ class Model:
                     return war
         raise KeyError(f"Objective {objective_id} not found in any War")
 
+    # TODO don't use this method as participant with same ID (player) can be in several wars!
     def get_war_by_war_participant(self, participant_id: str) -> War:
         for war in self.wars.values():
             for part in war.participants.values():
@@ -199,6 +217,7 @@ class Model:
                 return camp
         raise KeyError(f"Round {round_id} not found")
 
+    # TODO don't use this method as participant with same ID (player) can be in several campaigns!
     def get_campaign_by_campaign_participant(self, participant_id: str) -> Campaign:
         for war in self.wars.values():
             camp = war.get_campaign_by_campaign_participant(participant_id)
@@ -236,8 +255,8 @@ class Model:
         raise KeyError("Sector not found")
 
     def update_sector(self, sector_id: str, *, name: str, round_id: str, major_id: str, minor_id: str, influence_id: str):
-        camp = self.get_campaign_by_sector(sector_id)
-        camp.update_sector(sector_id, name=name, round_id=round_id, major_id=major_id, minor_id=minor_id, influence_id=influence_id)
+        war = self.get_war_by_sector(sector_id)
+        war.update_sector(sector_id, name=name, round_id=round_id, major_id=major_id, minor_id=minor_id, influence_id=influence_id)
 
     def remove_sector(self, sector_id: str):
         camp = self.get_campaign_by_sector(sector_id)
@@ -286,13 +305,29 @@ class Model:
     def get_round_index(self, round_id: str) -> int:
         camp = self.get_campaign_by_round(round_id)
         return camp.get_round_index(round_id)
+    
+    def get_round_sectors(self, round_id: str) -> list[Sector]:
+        camp = self.get_campaign_by_round(round_id)
+        return [s for s in camp.sectors.values() if s.round_id == round_id]
+
+    def get_round_participants(self, round_id: str) -> list[CampaignParticipant]:
+        camp = self.get_campaign_by_round(round_id)
+        return list(camp.participants.values())
 
     def remove_round(self, round_id: str):
-        camp = self.get_campaign_by_round(round_id)
-        camp.remove_round(round_id)
+        war = self.get_war_by_round(round_id)
+        war.remove_round(round_id)
 
 # Choices methods
 
+    def create_choice(self, round_id: str, participant_id: str) -> Choice:
+        war = self.get_war_by_round(round_id)
+        return war.create_choice(round_id, participant_id)
+    
+    def remove_choice(self, round_id: str, participant_id: str):
+        war = self.get_war_by_round(round_id)
+        war.remove_choice(round_id, participant_id)
+
     def get_round_choices_data(self, round_id: str):
         camp = self.get_campaign_by_round(round_id)
         rnd = self.get_round(round_id)
diff --git a/src/warchron/model/round.py b/src/warchron/model/round.py
index e4c2173..d388856 100644
--- a/src/warchron/model/round.py
+++ b/src/warchron/model/round.py
@@ -4,8 +4,8 @@ from uuid import uuid4
 class Round:
     def __init__(self):
         self.id: str = str(uuid4())
-        self.choices: dict[str, RoundChoice] = {}
-        self.battles = {}
+        self.choices: dict[str, Choice] = {}
+        self.battles: dict[str, Battle] = {}
         self.is_over: bool = False
 
     def set_id(self, new_id: str):
@@ -15,7 +15,7 @@ class Round:
         self.is_over = new_state
 
     def set_choice(self, participant_id: str, priority_sector_id: str | None, secondary_sector_id: str | None):
-        self.choices[participant_id] = RoundChoice(participant_id, priority_sector_id, secondary_sector_id)
+        self.choices[participant_id] = Choice(participant_id, priority_sector_id, secondary_sector_id)
    
     def toDict(self):
         return {
@@ -38,12 +38,30 @@ class Round:
     
 # Choices methods
 
-    def get_choice(self, participant_id: str) -> RoundChoice | None:
+    def get_choice(self, participant_id: str) -> Choice | None:
         return self.choices.get(participant_id)
  
+    def create_choice(self, participant_id: str) -> Choice:
+        if participant_id not in self.choices:
+            choice = Choice(
+                participant_id=participant_id,
+                priority_sector_id=None,
+                secondary_sector_id=None
+            )
+            self.choices[participant_id] = choice
+        return self.choices[participant_id]
 
-class RoundChoice:
+    def remove_choice(self,participant_id: str):
+        del self.choices[participant_id]
+
+class Choice:
     def __init__(self, participant_id: str, priority_sector_id: str | None = None, secondary_sector_id: str | None = None):
         self.participant_id: str = participant_id # ref to Campaign.participants
         self.priority_sector_id: str | None = priority_sector_id # ref to Campaign.sectors
         self.secondary_sector_id: str | None = secondary_sector_id # ref to Campaign.sectors
+
+class Battle:
+    def __init__(self, sector_id: str, player_1_id: str | None = None, player_2_id: str | None = None):
+        self.sector_id: str = sector_id # ref to Campaign.sector
+        self.player_1_id: str | None = player_1_id # ref to Campaign.participants
+        self.player_2_id: str | None = player_2_id # ref to Campaign.participants
diff --git a/src/warchron/model/war.py b/src/warchron/model/war.py
index db14c78..8de9951 100644
--- a/src/warchron/model/war.py
+++ b/src/warchron/model/war.py
@@ -3,6 +3,7 @@ from uuid import uuid4
 from datetime import datetime
 
 from warchron.model.campaign import Campaign, Sector, CampaignParticipant
+from warchron.model.round import Round, Choice, Battle
 
 
 class War:
@@ -12,7 +13,7 @@ class War:
         self.year: int = year
         self.participants:  dict[str, WarParticipant] = {}
         self.objectives: dict[str, Objective] = {}
-        self.campaigns = []
+        self.campaigns: list[Campaign] = []
         self.is_over: bool = False
 
     def set_id(self, new_id: str):
@@ -72,6 +73,7 @@ class War:
         obj.set_description(description)
  
     def remove_objective(self, objective_id: str):
+         # TODO manage sectors referring to it
         del self.objectives[objective_id]
 
 # War participant methods
@@ -100,6 +102,7 @@ class War:
         part.set_faction(faction)
 
     def remove_war_participant(self, player_id: str):
+        # TODO manage campaign_participants referring to it
         del self.participants[player_id]
 
 # Campaign methods
@@ -167,10 +170,10 @@ class War:
     def get_sector(self, id: str) -> Sector:
         return self.sectors[id]
 
-    def update_sector(self, objective_id: str, *, name: str, round_id: str, major_id: str, minor_id: str, influence_id: str):
-        obj = self.get_objective(objective_id)
-        obj.set_name(name)
- 
+    def update_sector(self, sector_id: str, *, name: str, round_id: str, major_id: str, minor_id: str, influence_id: str):
+        camp = self.get_campaign_by_sector(sector_id)
+        camp.update_sector(sector_id, name=name, round_id=round_id, major_id=major_id, minor_id=minor_id, influence_id=influence_id)
+
     def remove_sector(self, sector_id: str):
         camp = self.get_campaign_by_sector(sector_id)
         camp.remove_sector(sector_id)
@@ -204,6 +207,26 @@ class War:
         camp = self.get_campaign_by_campaign_participant(participant_id)
         camp.remove_campaign_participant(participant_id)
 
+# Round methods
+
+    def add_round(self, campaign_id: str) -> Round:
+        camp = self.get_campaign(campaign_id)
+        return camp.add_round()
+
+    def remove_round(self, round_id: str):
+        camp = self.get_campaign_by_round(round_id)
+        camp.remove_round(round_id)
+
+# Choice methods
+
+    def create_choice(self, round_id: str, participant_id: str) -> Choice:
+        camp = self.get_campaign_by_round(round_id)
+        return camp.create_choice(round_id, participant_id)
+
+    def remove_choice(self, round_id: str, participant_id: str):
+        camp = self.get_campaign_by_round(round_id)
+        camp.remove_choice(round_id, participant_id)
+
 class Objective:
     def __init__(self, name: str, description: str):
         self.id: str = str(uuid4())
diff --git a/src/warchron/view/view.py b/src/warchron/view/view.py
index 1ac1198..2f3a452 100644
--- a/src/warchron/view/view.py
+++ b/src/warchron/view/view.py
@@ -387,6 +387,8 @@ class View(QtWidgets.QMainWindow, Ui_MainWindow):
         if not name_item:
             return
         choice_id = name_item.data(Qt.ItemDataRole.UserRole)
+        if choice_id is None:
+            return
         menu = QMenu(self)
         edit_action = menu.addAction("Edit")
         action = menu.exec(self.choicesTable.viewport().mapToGlobal(pos))
@@ -396,16 +398,19 @@ class View(QtWidgets.QMainWindow, Ui_MainWindow):
     def show_round_details(self, *, index: int):
         self.roundNb.setText(f"Round {index}")
 
-    def display_round_choices(self, rows: list[dict]):
-        self.choicesTable.setRowCount(len(rows))
-        for row, data in enumerate(rows):
-            self.choicesTable.setItem(row, 0, QtWidgets.QTableWidgetItem(data["participant_name"]))
-            self.choicesTable.setItem(row, 1, QtWidgets.QTableWidgetItem(data["priority"]))
-            self.choicesTable.setItem(row, 2, QtWidgets.QTableWidgetItem(data["secondary"]))
-            self.choicesTable.item(row, 0).setData(
-                Qt.ItemDataRole.UserRole,
-                data["participant_id"]
-            )
+    def display_round_choices(self, participants: list[tuple[str, str, str, str]]):
+        table = self.choicesTable
+        table.clearContents()
+        table.setRowCount(len(participants))
+        for row, (participant, priority, secondary, choice_id) in enumerate(participants):
+            participant_item = QtWidgets.QTableWidgetItem(participant)
+            priority_item = QtWidgets.QTableWidgetItem(priority)
+            secondary_item = QtWidgets.QTableWidgetItem(secondary)
+            participant_item.setData(Qt.ItemDataRole.UserRole, choice_id)
+            table.setItem(row, 0, participant_item)
+            table.setItem(row, 1, priority_item)
+            table.setItem(row, 2, secondary_item)
+        table.resizeColumnsToContents()
 
 class PlayerDialog(QDialog):
     def __init__(self, parent=None, *, default_name: str = ""):