Tuesday's Okinawa Memorial Day marks the 75th anniversary of the end of the Battle of Okinawa. It was one of Japan's last major engagements of World War II, ending about six weeks before the dropping of the atomic bombs on Hiroshima and Nagasaki. Here’s a look at the battle:

When did the Battle of Okinawa take place?

On April 1, 1945, U.S. Army and Marine troops invaded the main island of Okinawa Prefecture, supported by naval forces. Some British, Australian, New Zealand and Canadian ships and men also participated in the invasion.