original_query: What was the primary objective of the Combined Bomber Offensive (CBO) during World War II?
query: What was the primary objective of the Combined Bomber Offensive (CBO) during World War II?
answer: The primary objective of the CBO shifted over time. Initially, the highest priority was to cripple the German air force's fighter strength, specifically targeting aircraft factories. This was crucial for ensuring Allied air superiority before the invasion of Northwest Europe. Later, priorities shifted to other targets such as V-weapon installations and oil production.