Ordnance QF 25-pounder
The 25-pounder was made because the British Army wanted to replace the 18-pounder and 4.5-inch howitzer. These artillery guns had been in use for a long time, and were too old to be useful against new guns. The 25-pounder was made when the British Army made a weapon that combined the best features from both older weapons. The resulting idea was a gun that could fire howitzer rounds as fast as the 18-pounder. The shell for the 25-pounder was planned to weigh about 30 pounds, and be about 3.75 inches thick.