The Allied 'Germany-first' grand strategy was formalized in which plan?

• A. Europe First plan
• B. Rainbow 5 plan
• C. Grand Alliance plan
• D. Atlantic Strategy plan

Answer: (D)

Defeating Germany first in Europe was the guiding objective behind Allied strategy in WWII. This approach, often called Europe First, was formalized at the Casablanca Conference in January 1943, when Roosevelt and Churchill agreed to prioritize defeating Nazi Germany before committing full resources to Japan. That decision shaped how the Allies organized the war: build up American and British forces in the UK, carry out heavy strategic bombing of German industry, and prepare the cross-Channel invasion (Operation Overlord) while keeping pressure on Germany from multiple fronts. The other named plans are not the standard designation for this decision—the term Europe First (often linked to the Casablanca agreement) is the recognized formalization of the Germany-first strategy.