Blast from the past. US Marines @ The Battle Of Alcatraz, 1946...

U.S. Marines (circled left) hurls grenades at armed convicts during the Battle of Alcatraz. They are commanded by WW2 Pacific War veterans WO Charles L. Buckner (who himself led the assault) and Generals Joseph Stilwell and Frank Merrill (of the famed "Merrill's Marauders"). [May 4, 1946] {1024x719}

Amazing.  I never heard of this incident.