The 15 cm schwere Feldhaubitze M. 15 was a heavy howitzer used by Austria-Hungary in World War I. Austrian and Czech guns were taken into Wehrmacht service after the Anschluss and the occupation of Czechoslovakia as the 15 cm schwere Feldhaubitze 15(t) or (ö). The M. 15 was adapted from a fortress turret howitzer design to throw the same ammunition as the schwere Feldhaubitze M. 14 some further. It didn't normally breakdown for transport, but could be disassembled into four loads for transport in mountainous areas.