Howitzer

The howitzer is a world object in Fallout 2, Fallout: New Vegas and appears as an unnamed artillery piece in Fallout 3. The model of the howitzer (NellisArtillery) is used in other artillery pieces.

Characteristics
The howitzer and other artillery are pre-War weapons that were used by the United States Armed Forces, some are mobile, some are stationary but all use the same basic principles and gunpowder as a propellant. They provide covering fire for ground forces, anti-air support, can soften up fortified targets, or fill a role in testing new varieties of shells, such as saturnite. A large number of these weapons were stored or fielded in various parts of the country.

Fallout 2

 * A howitzer can be used to gain access to the Sierra Army Depot, providing a wealth of resources.
 * The savant weapon smith Algernon in New Reno has been provided with a howitzer by Eldridge, the owner of the New Reno Arms, for maintenance. The weapon is to be added to his collection and stockpile of arms.

Fallout 3

 * The Talon Company possesses an unknown number of artillery pieces. They are never strictly identified as howitzers. Artillery strikes from the weapons can be called in on Seward Square and the super mutant behemoth at Takoma Park. Both include some form of operating instructions, which is a note near the signal switches.
 * The Enclave possess artillery in some form as well, as evidenced by the Sector artillery notes located at Adams Air Force Base. However, these weapons are only mentioned, as they do not have a means of being fired. The Enclave will instead fire from atop the mobile base crawler using their Big Guns.

Fixed artillery
Several fixed guns were positioned in Alaska to help safeguard the Alaskan Pipeline, however when the People's Liberation Army invaded the guns were seized and turned on the United States Armed Forces. During Operation: Anchorage the guns were finally silenced. How exactly control or destruction of the guns was carried out is unknown, as the only surviving record was a simulation that may or may not be entirely accurate in its portrayal of events. The guns make another appearance in Big MT, at the X-7a "Left Field" artillery launch. The guns at Big MT fire test rounds comprised of Saturnite (a space-age material), one of these shells can be used in a test firing targeted at the X-7b "Boom Town" target zone. The resulting crater reveals a hidden cache that the player can loot. The gun has infinite ammunition but it can only be fired into the X-7b and it only takes one shell to make the crater.