But when World ... war. The British Mark I tank was used in September 1916. It held ten men and reached speeds of almost four miles per hour. Battleships were the largest warships and had very big ...

But when World ... war. The British Mark I tank was used in September 1916. It held ten men and reached speeds of almost four miles per hour. Battleships were the largest warships and had very big ...

Various guns were used, until a true dueling pistol was officially standardized in 1777, as "a 9 or 10 inch barreled, smooth bore flintlock of 1 inch bore, carrying a ball of 48 to the pound." ...

The Bell UH-1 helicopter ... the 105mm howitzer used in Vietnam had seen action in World War II. Modified to improve field mobility, the guns served admirably throughout the Vietnam conflict.