In the Balkans… In the advance of the German 2nd Army, Zagreb is captured. The German advance is helped by the desertion of many Croat troops from the Yugoslav army. During the day Zagreb radio proclaims the establishment of an independent Croatian republic. The Croatian nationalist leader, Pavelic, is in Rome. Meanwhile, to the south, the Germans begin their attacks through the Monastir Gap route into Greece from Yugoslavia.

In Occupied France… In Brest, during the night of April 10-11, the Gneisenau is hit four times by bombs during a British air raid. The Scharnhorst is also in the port undergoing engine repairs. Neither battle cruiser will be able to join the Bismark in its cruise in May.

In North Africa… Rommel's troops begin to attack Tobruk with a small improvised force but are beaten off.