For 10 points, name this group of World War I veterans who marched on Washington in 1932 to demand early payment of after service compensation.
Two members of this group, William Hushka and Eric Carlson, were killed in a confrontation with the 12th Infantry and 3rd Calvary, while its second action the following year was more peaceful.  Organized in support of the Putnam Bill, this group was led by Walter W. Waters, while retired general Smedley Butler was its most prominent supporter.  Following the Senate's rejection of the Putnam Bill, Douglas MacArthur led a military campaign to clear this group from its campground in the Anacostia Flats.  For 10 points, name this group of World War I veterans who marched on Washington in 1932 to demand early payment of after service compensation.
Two members of this group, William Hushka and Eric Carlson, were killed in a confrontation with the 12th Infantry and 3rd Calvary, while its second action the following year was more peaceful.  
{Bonus Army} or {Bonus Expeditionary Force}