WWI US ARMY M1910 SHELTER HALF. In 1910 the US Army Infantry and Cavalry adopted separate designs for a new shelter half. The Cavalry opted for this one, the same basic style that had been in use since 1892, while the Infantry adopted a much smaller shelter half designed to use a rifle in the front and a bayonet in the back in lieu of poles. Experience gained during the Punitive Expedition convinced the Army to standardize on the Cavalry pattern shelter half in 1917. Price is for one shelter half only. It does not include pins, poles or rope. Two of these are required to make one shelter tent with one end open and one end closed.