The Battle of Solachon was fought in 586 CE in northern Mesopotamia between the East Roman (Byzantine) forces, led by Philippicus, and the Sassanid Persians under Kardarigan. The engagement was part of the long and inconclusive Byzantine–Sassanid War of 572–591. The Battle of Solachon ended in a major Byzantine victory which improved the Byzantine position in Mesopotamia, but it was not in the end decisive. The war dragged on until 591, when it ended with a negotiated settlement between Maurice and the Persian shah Khosrau II (r. 590–628).