The Model 1841 was the workhorse of The US Army during The Mexican War (1846=48). Incorporated into Government Arsenals in 1837, they would continue (especially in American Western Army use) – until 1870. A smoothbore artillery piece, the Model 1841 was capable of firing a 12-Pound Solid or Canister Shot over 1,000 yards – they were excellent for use in mountainous and hilly locations. The gun was “easily” disassembled for transportation by horse or pack mules. As a result of this, they were particularly effective in Mexico. 13 Model 1841 Howitzers were sent with General Fremont (to California) to assist in his conquest of that Territory.