The T-77 Tsanka tanks were a series of main battle tanks designed in the Tongorian Union. The first prototype, the Object 742 appeared in 1966 after the one-week war with Sector 53 has ended. A new battle tank was needed as the older ones suffered heavy casulties during this war. After several years of development the T-77 was finalised and the production began. The tank had very good anti-tank capabilities due to its high-velocity 115mm main gun. This tank was really succesful thanks to its simplicity and low cost. Upgraded versions are still used in 2012 by countries with small budget.