The Siege of Cyzicus was fought in 73 BC between armies of Mithridates VI of Pontus and the Roman-allied citizens of Cyzicus in Mysia and Roman Republican forces under Lucius Licinius Lucullus. It was a decisive Roman victory.After his victory against Marcus Aurelius Cotta at Chalcedon, Mithridates besieged the Roman-allied town of Cyzicus. The town held out long enough for the consul Lucius Licinius Lucullus to arrive with another Roman army and establish a counter-siege.