Answer:
In simple words, The German general strategy East targeted at using some of the colonized slave labor for both the Axis military effort, acquiring the oil deposits of the balkans and the fertile land of the Soviet territories, and ultimately by exterminating, enslaving, germanizing and mass expulsion to Siberia, removing the Slavic persons and creating a living space for Germany.
Japan designed the assault as a precautionary barrier to avoid the United States naval forces from trying to interfere with its scheduled military engagements throughout south - east asia out against United Kingdom , the Netherlands as well as the United States outlying islands.