Hitler's strategy for war was laid out in "Mein Kampf" (1925/1926). Whether Hitler intended global or merely European conquest, or whether he even had a plan for war in advance is debated; see Nazi foreign policy (historiographic debate). In "Mein Kampf", Hitler had imagined a short war against France, and then the conquest of the USSR. He had wrongly assumed that Britain would be a German ally in the west against France, and so he did not foresee an enduring war in the west.