World War II Memorial, Washington D.C. The World War II Memorial honors the 16 million who served in the armed forces of the U.S., the more than 400,000 who died, and all who supported the war effort from home. Symbolic of the defining event of the 20th Century, the memorial is a monument to the spirit, sacrifice, and commitment of the American people. The Second World War is the only 20th Century event commemorated on the National MallÕs central axis. Photo by Carol Highsmith.