Battle of Czajanek's Barracks

The only known battle between the Czechs and the Nazis during the prewar occupation.
"The Battle of Čajánek's barracks was a confrontation between the Czechoslovak and German armies, which took place on 14 March 1939 in the course of the German occupation of Czechoslovakia. Together with a clash which allegedly took place at Moravska Trebova, this was the only known Czechoslovak active resistance to the German Army during the occupation of Bohemia & Moravia in March 1939. The battle took place simply because German forces cut Czechoslovak communication lines too early and army unit stationed in the barracks thus didn't receive general order to surrender."
Battle of Czajánek's barracks - Wikipedia