Kristallnacht: a nationwide pogrom, november 9-10, 1938

To the wearer of swastika will come from the four winds of heaven good luck, long life and prosperity. The swastika is the oldest cross, and the oldest symbol in the world. Of unknown origin, in frequent use in the prehistoric items, it historically first appeared on coins as early as the year 315 B.C.

As this suggests, while the symbol of the swastika is most frequently associated with Hitler and Nazis during World War II, and is still used by neo-Nazi groups, the symbol itself has a much longer history. 
Archaeological evidence of swastika-shaped ornaments dates from the Neolithic period. An ancient symbol, it occurs mainly in the cultures that are in modern day India and the surrounding area, sometimes as a geometrical motif and sometimes as a religious symbol. It was long widely used in major world religions such as Hinduism, Buddhism and Jainism.

Before it was co-opted by the Nazis, the swastika decorated all kinds of things.  Uni Watch has tons of examples. Here it is on a Finnish military plane:

A Boy Scout badge:

A women’s hockey team called the Swastikas from Edmonton (from 1916):

Another hockey team: