The Ostian War of Independence, also known as the Ostian Revolutionary War was a war fought between the Kingdom of Vesryn, the fledgling territory of Ostia and men from the Northern Tribes of Ostia. The war took place from 1353 to 1358, during the Common Era. The Ostian Army, led by Duke Arron Willard, defeated the armies of Vesryn. The territory became independent and instituted its own monarchy, becoming the Kingdom of Ostia.