From the post:
Rising Sun is the latest intelligence handbook for Flames Of War and the fourth book for Early War. It is the first of two books that will cover the fighting in the east centred on the Soviet Union. In a departure from the previous Early War books, where we have handled each theatre in one large volume, this time were decided to divide the fighting between the Soviet Union's early fighting on the its border in 1939 and 1940, and Operation Barbarossa when the Germans invaded in 1941. Soviet expansion led to wars against Poland and Finland. In the far-east the Soviet Union shared a border with Manchukuo (Manchuria), a puppet-state of Japan and tensions eventually exploded into war 1939 between Japan and the Soviet Union.