The MS-1 (Russian: Maliy Soprovozhdeniya-Perviy, "First Small [Vehicle for] Support") is one of the six current Tier 1 tanks in World of Tanks. It is at the top of the Russian tech tree, which means that players wanting to play other Russian tanks must start by completing research on its research tree. The MS-1's research tree allows a player to branch off to 3 different types of tank, an SPG, the SU-18,a TD, the AT1, and 2 Light tanks, the BT-2, leading to medium tanks, and the T-26, leading to the T-46 and heavy tanks
The MS-1 is free, therefore meaning a player wishing to buy it must only have an open garage space. This allows players who initially sold the MS-1 in order to free up spaces for other tanks the abilility to acquire the tank at a later time at no penalty.
The MS-1 was the first Soviet-designed tank, and is historically called the T-18. Produced from 1928–31, it was based on the Renault FT-17, with the addition of a vertically sprung suspension.
The MS-1 and its derivatives were essentially unsuccessful designs, but they gave Soviet industry its first experiences in designing armored vehicles, and in the meantime a number of foreign tank designs were available for production.
armour: up to 16mm thick
gun: 37mm gun
speed: 7.5 mph
engine: 35 bhp