What document served as the doctrinal blueprint for the American air effort in World War II?

The document that served as the doctrinal blueprint for the American air effort in World War II is the Air War Planning Document. This document laid out the overarching strategies and plans that guided the use of air power during the conflict. It provided a structured framework addressing objectives, resource allocation, and coordination among different branches of the military.

In looking at other options, the Aerial Combat Plan is more of a tactical document specific to engagement strategies in air combat rather than a comprehensive blueprint for an entire war campaign. The Strategic Air Command Directive pertains to post-World War II strategies and bombers’ roles during the Cold War rather than providing wartime doctrine for World War II. Operation Order 33 typically refers to specific military operations and directives rather than the broad strategic planning that the Air War Planning Document represents. Overall, the correct answer captures the comprehensive nature of air strategy required for such a large-scale conflict.