This army was created in 1939 as a response to the growing threat of German aggression. Its task was to protect Silesia and Western Małopolska region. It was leaded by general Antoni Szylling. Poland was attacked by German army on the 1st of September 1939, and already on the 2nd of September army “Krakow” had to retreat because of the overwhelming forces of the enemy. It has joined armies “Karpaty” and “Lublin”, they continued fighting but were surrounded and on the 20th of January had to capitulate.