When I was growing up, every WWII documentary was in black and white, so I — along with everyone else — just assumed there was no color footage. Happily, over the past couple of decades, lots of color footage has surfaced.
These clips are from the Battle of the Philippine Sea, June 19–20, 1944, also known as the Marianas Turkey Shoot. The ground campaign of the Battle of Saipan too place 15 June – 9 July 1944.
Color also makes the horrors of war much more apparent.