Franz Epp was born in Munich in 1868, the son of the painter Rudolph Epp and Katharina Streibel. He spent his school years in Augsburg and after this joined the military academy in Munich. He served as a volunteer in East Asia during the Boxer rebellion in 1900–01 and then became a company commander in the colony of German South-West Africa (now Namibia), where he took part in the bloody Herero and Namaqua Genocide. During the First World War, he served as the commanding officer of the Royal Bavarian Infantry Lifeguards Regiment in France, Serbia, Romania, and at the Isonzo front.