"To the Chair of the State Committee of Defense of the Union of Soviet Socialist Republics, I.V. Stalin.
Fulfilling our duty to the Motherland in this period of relentless and heroic struggle of the Soviet people against the German fascist occupants, and protection of our honour, freedom, and independence, we developed blueprints of a new combat vehicle.
During development, we have considered the following factors:
- High movement speed.
- Low damage as a result of being hit.
- Large operational range.
- Ability to suddenly attack the enemy.
February 9th, 1943"