What happened April 1941 AD

On 6 April 1941, German forces, with Hungarian and Italian assistance, launched an invasion of Yugoslavia.

Germany responded with simultaneous invasion of Yugoslavia. It was Known as the April War or Operation 25, which occurred between 6 to 18 April. The attack led to German occupation to Yugoslavia.

Although the Axis victory was swift, bitter and large-scale partisan warfare subsequently broke out against the Axis occupation of Yugoslavia, which continued until the end of the war (6 April 1941 – 25 May 1945).

On 10 April 1941, Slavko Kvaternik proclaimed the Independent State of Croatia, and Tito responded by forming a Military Committee within the Central Committee of the Yugoslav Communist Party.

The Siege of Tobruk lasted for 241 days in 1941, after Axis forces advanced through Cyrenaica from El Agheila in Operation Sonnenblume against Allied forces in Libya, during the Western Desert Campaign (1940–1943) of the Second World War. The siege diverted Axis troops from the frontier and the Tobruk garrison repulsed several Axis attacks.

Yugoslavia and Greece were invaded in April 1941 and surrendered before the end of the month. Germany and Italy divided Greece into occupation zones but did not eliminate it as a country. The key areas of Central Macedonia, Athens, and Thessaloniki were occupied by Germany while others by Italians and parts by Bulgarian forces.

In April 1941, Soviet aid ended with the Soviet–Japanese Neutrality Pact and the beginning of the Great Patriotic War. This pact enabled the Soviet Union to avoid fighting against Germany and Japan at the same time.And in August 1945, the Soviet Union annulled the neutrality pact with Japan.

With the Soviets wary of mounting tensions with Germany and the Japanese planning to take advantage of the European War by seizing resource-rich European possessions in Southeast Asia, the two powers signed the Soviet–Japanese Neutrality Pact in April 1941.

The Allies became sufficiently disturbed by German plots revolving around the Duke that President Roosevelt ordered covert surveillance of the Duke and Duchess when they visited Palm Beach, Florida, in April 1941.

On 17 April 1941, after King Peter II and other members of the government fled the country, the remaining representatives of the government and military met with the German officials in Belgrade.