diff --git a/data/example.json b/example.json
similarity index 97%
rename from data/example.json
rename to example.json
index c12a44a..e94efdd 100644
--- a/data/example.json
+++ b/example.json
@@ -30,7 +30,7 @@
       "name": "Llael War 2025",
       "year": 2025,
 
-      "registered_players": {
+      "entrants": {
         "e7844fbb-8366-44e4-bb43-89b9eef6ef64": {
           "war_points": 0,
           "influence_tokens": 1
@@ -83,7 +83,7 @@
         }
       ],
 
-      "completed": false
+      "is_completed": false
     }
   ]
 }
diff --git a/src/warchron/model/campaign.py b/src/warchron/model/campaign.py
new file mode 100644
index 0000000..ffe070b
--- /dev/null
+++ b/src/warchron/model/campaign.py
@@ -0,0 +1,45 @@
+from uuid import uuid4 
+from datetime import datetime
+
+from warchron.model.round import Round
+
+class Campaign:
+    def __init__(self, name):
+        self.id = str(uuid4())
+        self.name = name
+        self.month = datetime.now().month
+        self.entrants = {}
+        self.rounds = {}
+        self.is_over = False
+
+    def set_id(self, new_id):
+        self.id = new_id
+
+    def set_name(self, new_name):
+        self.name = new_name
+
+    def set_month(self, new_month):
+        self.month = new_month
+        
+    def set_state(self, new_state):
+        self.is_over = new_state
+
+    def toDict(self):
+        return {
+            "id" : self.id,
+            "name" : self.name,
+            "month" : self.month,
+            "entrants" : self.entrants,
+            "rounds" : self.rounds,
+            "is_over": self.is_over
+        }
+    
+    @staticmethod
+    def fromDict(id, name, month, entrants, rounds, is_over):
+        tmp = Campaign(name=name)
+        tmp.set_id(id)
+        tmp.set_month(month)
+        ## entrants placeholder
+        ## rounds placeholder
+        tmp.set_state(is_over)
+        return tmp
\ No newline at end of file
diff --git a/src/warchron/model/model.py b/src/warchron/model/model.py
index ff88508..5e97b44 100644
--- a/src/warchron/model/model.py
+++ b/src/warchron/model/model.py
@@ -3,19 +3,22 @@ import json
 import shutil
 
 from warchron.model.player import Player
+from warchron.model.war import War
 
 class Model:
     def __init__(self):
         self.players = {}
+        self.wars = {}
 
     def new(self):
         self.players.clear()
-        # self.wars.clear()
+        self.wars.clear()
         # self.campaigns.clear()
         # self.rounds.clear()
 
     def load(self, path: Path):
         self.players.clear()
+        self.wars.clear()
         self._load_data(path)
         
     def save(self, path: Path):
@@ -66,3 +69,13 @@ class Model:
     def get_all_players(self) -> list[Player]:
         return list(self.players.values())
 
+    def add_war(self, name):
+        war = War(name)
+        self.wars[war.id] = war
+        return war
+
+    def get_war(self, id):
+        return self.wars[id]
+
+    def get_all_wars(self) -> list[War]:
+        return list(self.wars.values())
diff --git a/src/warchron/model/round.py b/src/warchron/model/round.py
new file mode 100644
index 0000000..faceb0d
--- /dev/null
+++ b/src/warchron/model/round.py
@@ -0,0 +1,31 @@
+class Round:
+    def __init__(self, number):
+        self.number = number
+        self.sectors = {}
+        self.choices = {}
+        self.battles = {}
+        self.is_over = False
+
+    def set_number(self, new_number):
+        self.number = new_number
+
+    def set_state(self, new_state):
+        self.is_over = new_state
+
+    def toDict(self):
+        return {
+            "number" : self.number,
+            "sectors" : self.sectors,
+            "choices" : self.choices,
+            "battles" : self.battles,
+            "is_over": self.is_over
+        }
+
+    @staticmethod
+    def fromDict(id, number, sectors, choices, battles, is_over):
+        tmp = Round(number=number)
+        ## sectors placeholder
+        ## choices placeholder
+        ## battles placeholder
+        tmp.set_state(is_over)
+        return tmp
\ No newline at end of file
diff --git a/src/warchron/model/war.py b/src/warchron/model/war.py
new file mode 100644
index 0000000..308cec2
--- /dev/null
+++ b/src/warchron/model/war.py
@@ -0,0 +1,46 @@
+from uuid import uuid4 
+from datetime import datetime
+
+from warchron.model.campaign import Campaign
+
+class War:
+    def __init__(self, name):
+        self.id = str(uuid4())
+        self.name = name
+        self.year = datetime.now().year
+        self.entrants = {}
+        self.campaigns = {}
+        self.is_over = False
+
+        
+    def set_id(self, new_id):
+        self.id = new_id
+
+    def set_name(self, new_name):
+        self.name = new_name
+
+    def set_year(self, new_year):
+        self.year = new_year
+        
+    def set_state(self, new_state):
+        self.is_over = new_state
+
+    def toDict(self):
+        return {
+            "id" : self.id,
+            "name" : self.name,
+            "year" : self.year,
+            "entrants" : self.entrants,
+            "campaigns" : self.campaigns,
+            "is_over": self.is_over
+        }
+    
+    @staticmethod
+    def fromDict(id, name, year, entrants, campaigns, is_over):
+        tmp = War(name=name)
+        tmp.set_id(id)
+        tmp.set_year(year)
+        ## entrants placeholder
+        ## campaigns placeholder
+        tmp.set_state(is_over)
+        return tmp
\ No newline at end of file