compute campaign points from rounds

src/warchron/model/war.py

@@ -413,6 +413,15 @@ class War:
 
     # Battle methods
 
+    # TODO replace multiloops by internal has_* method
+    def get_battle(self, battle_id: str) -> Battle:
+        for camp in self.campaigns:
+            for rnd in camp.rounds:
+                for bat in rnd.battles.values():
+                    if bat.sector_id == battle_id:
+                        return bat
+        raise KeyError("Round not found")
+
     def create_battle(self, round_id: str, sector_id: str) -> Battle:
         camp = self.get_campaign_by_round(round_id)
         if camp is not None: