When the 90% silver Mercury Dime was introduced in 1916, its design was symbolic of the nation's state of mind, as World War I raged in Europe and the United States tried to keep out of the conflict. Liberty's winged cap symbolized freedom of thought, in contrast to the tyrannical ambitions of some European countries. The bundle of fasces with battle-ax on the reverse signified strength and readiness to defend, while the olive branch represented America's love of peace.