This weapon was adopted by the US Army as the 2.95-inch Pack Howitzer during the Philippine Insurrection. They were declared obsolete after the 75-mm M1 was standatdized, but some were dragged out of store and employted by US and Filipino units during the campaign of 1941-42.
"Artillery support for Wainwright's corps was provided by the 71st Field Artillery (less 1st Battalion), two batteries of the 91st Field Artillery, one battery of the 23d Field Artillery, a battery of 75-mm. guns (SPM), and two 155-mm. guns. Colonel Fowler, who commanded this force, had altogether thirty-three pieces, all but two of which were 75-mm. guns or 2.95-inch mountain howitzers."
"Field artillery components of the Philippine Division consisted of the two-battalion 24th Regiment (truck-drawn British 75-mm. guns) with 843 officers and enlisted men, and one battalion of the 23d, with 401 men and armed with 2.95-inch mountain guns (pack). Plans existed for the organization at a later date of the 25th Field Artillery and a separate battalion of 155-mm. guns for use with the division. The division also included the standard engineer, ordnance, signal, military police, medical, and quartermaster units. The total strength of the Philippine Division on 31 July was 10m473 men, distributed as shown in Table 1."
