The KV-1S is a Soviet, tier 6, heavy tank.

This tank is a lighter, upgraded version of KV-1. This tank has the fastest speed of all tier 6 heavy tanks. It's best utilized as supporting flanks and for ambushing.

It's strengths include it's fast speed, and great traverse rate. Also it mounts an excellent gun for its tier with huge penetration and damage, but with low reload speed and slow aiming speed.

Its weaknesses inlcude low armor and health, and poor acceleration.