Jan–?? 341Council of Antiochcompromises withArianism
341–342Constans defeatsFranks in 2-year war
342Bosporan Kingdomfalls into decline
343Council of Serdicareasserts Nicene Creed
343Constantius II raidsinto Persian Empire
344Romans & Persiansclash in costly battleat Singara
346Unsuccessful Persiansiege of Nisibis