Timeline (The Day of Infamy)

1941
December 7th: Japan Launches a surprise attack against the Soviet Pacific Fleet anchored at Vladivostok. Not all ships were achored that day, however, the attack was conducted more for the purpose of lowering Soviet morale more than anything. America continues their Isolationist policies.

December 8th: Japan Declares war on the Soviet Union. Later that day, The Japaneese send an invasion force into the Soviet Far East. OTL attacks on Malaya and Thailand commence as well. The Phillipines is not invaded, and the Japaneese plan to keep the US out of the war. The USSR is forced to order troops to the East to combat the Japaneese threat.

December 17th: Vladivostok falls to the Japanese

December 19th: the Japanese capture Khabarovsk

1942
January 3rd: The whole of the island of Sakhalin is captured by the Japanese

January 7th: German troops are driven away from Moscow, as the Soviets begin reconquering lost territory

Febuary 15th: Singapore falls to the Japaneese. They continue expansion in the south.

Febuary 24th: German and Finnish troops successfully capture the strategic port of Murmansk. Most supplies must now go through Arkhangelsk, a longer route which gives the Kreigsmarine more advantages to disrupt their supply lines.

May 7th: The Germans begin Operation Blue, an advance in the south to capture the vital rescources in the Caucasus.