After a brief peace early in Diocletian's reign, the Persians renewed hostilities when they invaded Armenia and defeated the Romans outside Carrhae in either 296 or 297. However, Galerius crushed the Persians in the Battle of Satala in 298, capturing the treasury and the royal harem. The resulting peace settlement gave the Romans control of the area between the Tigris and the Greater Zab. This was the most decisive Roman victory for many decades; all the territories that had been lost, all the debatable lands, and control of Armenia lay in Roman hands.* Frye (1993), 130–131; Southern (2001), 243</ref>