diff --git a/game/campaignloader/campaignairwingconfig.py b/game/campaignloader/campaignairwingconfig.py
index 9bac5257..0442db3b 100644
--- a/game/campaignloader/campaignairwingconfig.py
+++ b/game/campaignloader/campaignairwingconfig.py
@@ -40,11 +40,6 @@ class SquadronConfig:
             secondary = [FlightType(s) for s in secondary_raw]
 
         max_size = data.get("size", DEFAULT_SQUADRON_SIZE)
-        if max_size is None:
-            raise RuntimeError(
-                "Squadron's size is defined in campaign but is missing a value:\n"
-                f"{data}"
-            )
 
         return SquadronConfig(
             FlightType(data["primary"]),