It was essentially the Canon de 155 C modèle 1915 Schneider fitted with a different breech to use bagged propellant rather than the cartridge cases used by the older howitzer.

Surviving weapons were in service with France, Poland, Greece, Italy, Belgium, the United States, and Finland during World War II.

The Canon de 155 C modèle 1915 was based on Schneider's 152 mm (6.0 in) M1910 howitzer that had been sold to the Russian Empire.

[1] The Mle 1915 was a conventional design with a hydro-pneumatic recoil system mounted under the barrel, a gun shield to protect the crew and a box carriage with wooden wheels.

It used an interrupted-screw breech with separate-loading ammunition; the shell being loaded first followed by the proper amount of propellant in a brass cartridge case.

This became a real problem during the war given the vast number of shells expended and Schneider was asked to redesign the gun to use a de Bange obturator and allow it to use bagged powder.

[5] The Argentine Army used an updated variant of this howitzer with split-trail carriage, locally called Obús Schneider L.15.05 modelo 1928 calibre 155 mm.

Eighteen American guns were issued to the 2/1st Field Regiment, Royal Australian Artillery in the Middle East during December 1941.

The guns are still in service in the artillery regiments ReA-2 "BOLÍVAR" (1st MECHANIZED BRIGADE) and RA-3 "PISAGUA" (3rd ARMY DIVISION).

These were rebarreled in Finland's standard 152 mm although they retained their original breeches, which meant that the H/15 used Russian-style cartridge cases and the H/17 used bagged powder.

[12] Italy captured eight during the Battle of France and ninety-six from Greece during the Balkan Campaign and placed them into service as the Obice da 155/14 PB.

The colonial army's heavy field artillery unit, the 301st FA Regiment which fought in Bataan, was equipped with GPFs and two 155 mm howitzers.

These American-made French-designed artillery pieces arrived in the Philippines on 14 October 1941, along with fifty halftracks fitted with 75 mm guns.

It is fitted with a modified straight shield and a non-standard barrel, which resembles the tube of a Japanese Type 91 10 cm Howitzer.

Portugal acquired a battery of four pieces in the World War I integrated in the Portuguese Expeditionary Corps.

[5] Apparently the Soviets rebarreled surviving howitzers to use their standard 152 mm cased ammunition,[8] the Germans gave them the designation 15.2 cm sFH 449(r), but none seemed to be on hand on 22 June 1941 at the start of Operation Barbarossa.

[16] The first guns were procured in France in 1917, the weapon being declared standard for Army use in November 1922, although their first military use was in Africa in 1921 during the assault at Turiet Hamed.

The gun was also built under license at Trubia and was used by the Regimientos de Artillería Pesados (Heavy Artillery Regiments).

They began to arrive in the North African theater at the end of 1941 and equipped medium regiments of the Royal Artillery serving in the Eighth Army.

[19] The general policy of the US Army in World War I was to initially acquire French or British weapons to simplify the supply system and allow their forces to enter combat as soon as possible.

The M1918M1 carriage that had air brakes, new metal wheels, and pneumatic rubber tires for high-speed motor traction was developed beginning in 1934 and was standardized in 1936.

They saw limited use with both U.S. Army and Marine artillery units in the early part of the war while shortages of the 155 mm howitzer M1 were resolved.

[23][24] Thirty-six C17S's were in Yugoslav service by the 1920s although it is unclear whether these were weapons furnished to Serbia during World War I or bought by Yugoslavia during the 1920s.