This DLC is a mission pack that focuses on battles in Western Europe in 1938-40. It adds 2 countries (Belgium and the Netherlands), over 70 units (American, Belgian, British, Canadian, Dutch, French, and Polish), and over 50 editor formations. It has 12 battles divided up among the following operations:

i. Hypothetical Allied offensive in 1938 in support of Czechoslovakia.
ii. Hypothetical Allied offensive in 1939 in support of Poland.
iii. German advance into the Low Countries in 1940.
iv. German advance into France in 1940.

The screenshot shows the selection of some of the new units included in this DLC on a map from the 1938 Allied offensive operation.