M198

The M198 emerged from U.S. requirements for a 155 mm towed howitzer with better range and mobility than older systems. Rock Island Arsenal material identifies the weapon as a standard 155 mm howitzer introduced in the late Cold War period. Its split-trail carriage, hydropneumatic recoil system, and transport arrangement supported both conventional towing and helicopter movement by aircraft such as the CH-47 and CH-53.

As a 155 mm field gun, the M198 occupied the heavy end of towed tactical artillery. It required a full gun crew and deliberate emplacement, but it delivered the shell weight and range needed for counter-fire, interdiction, and support of maneuver forces. The design was not self-propelled; its battlefield value depended on prime movers, prepared firing positions, and coordinated ammunition supply.

The M198 became a familiar U.S. Army and Marine Corps weapon, but its weight was a persistent operational cost. Later replacement by the M777 reflected the same need for 155 mm firepower with far better tactical and expeditionary mobility. That transition does not reduce the M198's importance: it was the standard heavy towed howitzer for a generation of U.S. artillery units.