A Focus Pack built around one specific question: what if Czechoslovakia had stood its ground at Munich in 1938 instead of handing over the Sudetenland without a fight? Every bit of content grows out of that fork in the road.
What New Content It Adds
Being a Focus Pack, all the content is concentrated on one country — no new mechanics, nothing that changes the rest of the game.
Nations: Czechoslovakia
Czechoslovakia gets an entire tree built around the scenario of standing up to German pressure at the Munich Conference, with different ideological and military routes to try to survive what, in real history — and in a game without this DLC — was an annexation with barely any resistance. It has far more depth than the generic base-game Czechoslovakia: it's not a superficial patch, it's a nation rebuilt entirely around a single "what if."
A Small, Focused Buy
Only worth it if you specifically want to play Czechoslovakia — it doesn't change anything about other nations or add new mechanics to the game. That said, it's one of the few DLCs that dares to turn a historical divergence point into the central axis of an entire nation, instead of just padding the tree with more options.