This was the standard issue haversack for soldiers
of the United States military prior to the introduction of the M1910
Haversack. The haversack allowed the soldier to carry his rations, mess
gear, and small personal items. Although the M1904 haversack was
outdated by World War I, many National Guard units arrived in France
still using this haversack. The M1904 haversack attached to the
cartridge belt using two bent wire hooks. Haversacks prior to 1904 were
carried using a leather strap.
The outer flap is marked with "3 N.Y." and "F. 91".