NAACP membership peaks at 450,000 during wartime

By 1945 NAACP membership had grown from 50,000 in 1940 to approximately 450,000 — a ninefold increase driven by wartime mobilization, the Double V campaign, and high-profile cases including the Port Chicago mutiny defense. The expanded membership gave the NAACP the institutional strength to pursue the legal strategy culminating in Brown v. Board of Education.