Revert "Use the actual Country type instead of the name."

This reverts commit bd2ec12e0f.

Country is both the data (name, ID, etc) and the container for groups
added to the miz, so it can't be used across multiple mission
generations. See https://github.com/pydcs/dcs/issues/314 for potential
follow up work that would let us do this.

Fixes https://github.com/dcs-liberation/dcs_liberation/issues/2864.

game/factions/faction.py

@@ -7,7 +7,7 @@ from functools import cached_property
 from typing import Any, Dict, Iterator, List, Optional, TYPE_CHECKING, Type
 
 import dcs
-from dcs.country import Country
+from dcs.countries import country_dict
 from dcs.unittype import ShipType, StaticType, UnitType as DcsUnitType
 
 from game.armedforces.forcegroup import ForceGroup
@@ -28,7 +28,6 @@ from game.data.doctrine import (
 from game.data.groups import GroupRole
 from game.data.units import UnitClass
 from game.dcs.aircrafttype import AircraftType
-from game.dcs.countries import country_with_name
 from game.dcs.groundunittype import GroundUnitType
 from game.dcs.shipunittype import ShipUnitType
 from game.dcs.unittype import UnitType
@@ -44,7 +43,7 @@ class Faction:
     locales: Optional[List[str]]
 
     # Country used by this faction
-    country: Country
+    country: str = field(default="")
 
     # Nice name of the faction
     name: str = field(default="")
@@ -169,15 +168,15 @@ class Faction:
 
     @classmethod
     def from_dict(cls: Type[Faction], json: Dict[str, Any]) -> Faction:
-        try:
-            country = country_with_name(json["country"])
-        except KeyError as ex:
-            raise KeyError(
-                f'Faction\'s country ("{json.get("country")}") is not a valid DCS '
-                "country ID"
-            ) from ex
+        faction = Faction(locales=json.get("locales"))
 
-        faction = Faction(locales=json.get("locales"), country=country)
+        faction.country = json.get("country", "/")
+        if faction.country not in [c.name for c in country_dict.values()]:
+            raise AssertionError(
+                'Faction\'s country ("{}") is not a valid DCS country ID'.format(
+                    faction.country
+                )
+            )
 
         faction.name = json.get("name", "")
         if not faction.name: