German invasion of the Netherlands
Of all German armies in the battle, this was the weakest. It contained only four regular infantry divisions (the 207th, 227th, 254th and 256th Infantry Divisions), assisted by three reserve divisions (208th, 225th, and 526th Infantry Divisions). Six of these divisions were units created in August 1939 from territorial Landwehr units. They had few professional officers and little fighting experience.