2S7 Pion I

2S7 Pion (rus. "peony"; I don't know who names these guns. Peony, Carnation, Acacia, Hyacinth, Tulip...) is a heavy self-propelled howitzer developed in Soviet Union on a base of modified T-80 tank chassis. This massive 203 mm gun needs a crew of 7 to be prepared to fire. The projectile is loaded automatically, while the propellant is placed by hand. The the crew retreats, leaving only a gunner sitting right next to the gun's breech to aim the gun and fire it. Pion has a range of 37,5 km, but using rocket-assisted projectiles the range increases to 55 km. It can fire HE, fragmentation, chemicel (no longer used) or even nuclear shells. It is often regarded as the most powerful self-propelled gun in the world. Most recently, they were used during South Ossetia War in 2008.