US Marines Firing the M777 155mm Howitzer

Marines with Fox Battery, 2nd Battalion, 11th Marine Regiment firing the M777 155mm howitzer. Video by Lance Cpl. Ashton Buckingham | 1st Marine Division 

AiirSource covers military events and missions from the U.S. Army, Navy, Marine Corps, Air Force, and Coast Guard.

As you can see this mortar has to be operated by soldiers and is also hard to command it because the reloading is very dificult but it is not all, they have to shoot and change the position very fast if they do not want to be detected by the enemy.

This is a mortar from the first world of war..