Marines listen to Mr. Ray Shearer, a Marine veteran and director and chairman of American Oversees Memorial Day Association, explain different factors in the Battle of Belleau Wood during World War I, on the battle ground Belleau, France, May 26, 2016. Marines observed trenches, depressions of fighting holes and enemy shelling on the battle ground. - Marines listen to Mr. Ray Shearer, a Marine veteran and director and chairman of American Oversees Memorial Day Association, explain different factors in the Battle of Belleau Wood during World War I, on the battle ground Belleau, France, May 26, 2016. Marines observed trenches, depressions of fighting holes and enemy shelling on the battle ground.