As the new PBS documentary Asian-Americans notes, many Asian-American immigrants maintained strong bonds to their home countries and were deeply affected by World War II conflicts that occurred in the Pacific theater. In fact, even before U.S. involvement and the Japanese attack on Pearl Harbor in 1941, Asian-Americans from the D.C. area closely followed the brewing conflict between China and Japan. Many still had close relatives in China, and Japanese imperialist expansion into China and the resulting Second Sino-Japanese War moved Chinese-Americans at home to organize. On July 7, 1938, in recognition of the one year anniversary of the war’s outbreak, D.C. Chinatown's shops and restaurants closed as the Chinese community gathered in the streets.