Part of my 'Attrition' IP.
There has only ever been one world war and it persists, endless in its catastrophe. The great powers of Europe rage against one another. Their cities are either craters of irradiated dust... or hulking fortresses... glorified factories of both people and machines of destruction.
Fortress London - The Great Citadel. The Ministry of War. An enormous, hardened bunker stands defiantly on the horizon. Bristling with AA guns.