Among the best tanks in terms of both reliability and sheer production capability, M4 Sherman series of tanks became the staple fighting-vehicles of the WWII Allies. The 1st version to be produced, was succeeded by the welded-hull M4, the diesel engine M4A2, and finally the representative tank of the series, the M4A3.
“TYPHOON” class ballistic missile submarine is the biggest submarine in the world by far .It was one of the most feared weapons of the Cold War. The submarine's design includes features for traveling under ice and breaking ice. Each submarinecan carry twenty long-range ballistic missiles with nuclear warheads.