The M551 Sheridan Tank (or simply Sheridan) is a light tank developed during the 1960s and in service with the U.S. Armed Forces in 1969 to 1996. Officially known as the Armored Reconnaissance/Airborne Assault Vehicle M551. The Sheridan saw extensive use during the later years of the Vietnam War. Later on, it was not used very often by U.S. forces, only a few during the Panama conflict in 1989-90 and during the Gulf War of 1990-91.
The Sheridan is a tank issued to the American and South Vietnamese factions. It appears on most of the maps. Performance wise, being a light tank, the Sheridan is similar to the PT-76. It has a main cannon with 30 rounds to fire, a co-axial machine gun with 400 rounds in reserve and a mounted machine gun with 400 rounds in reserve.
Its main gun is highly effective against other vehicles, being capable of destroying another tank in 3 or 4 direct hits. It can also kill infantry fairly easily, although the round's small blast radius can make it difficult. The driver also commands a co-axial machine gun for infantry, which can kill fairly quickly with good accuracy. Another player can take control of the mounted M2 Browning atop the turret, but this will generally attract many players as the one on the machine gun is a very open and immobile target. It's a generally safe way to travel, combining a good balance between speed and armor, and is amphibious in later versions of the game.