Tachauer Dreihacken is a place, that after the Treaty of Saint-Germain belonged to Czechoslovakia and was situated in the administrative region Mariánské Lázně.
Tachauer Dreihacken was formerly part of the German Empire. In the German Empire, the place was called Tachauer Dreihacken. The place is now called Tři Sekery * and belongs to Czech Republic.