ARMA 3 is an open-world military tactical shooter video game developed by Bohemia Interactive for Microsoft Windows. It was released on September 12, 2013. ARMA 3's storyline takes place in the mid-2030s during the fictional Operation Magnitude, a military operation launched by NATO forces fighting in Europe against "Eastern armies" referred to as CSAT (Canton-Protocol Strategic Alliance Treaty) led by a resurgent Iranwith a coalition of other Middle Eastern and Asian nations.
Set more than 25 years after the events of ARMA 2 in 2035, NATO forces deployed to islands of the Altis and Stratis fight against a massive CSAT offensive from the east. The single-player campaign will have the player take control of Corporal Ben Kerry, a US Army soldier. Initially, the player must survive on his own after friendly forces are defeated in a failed NATO operation. During the campaign, the player will face everything from lone wolf infiltration missions to the commanding of large scale armored operations. The player will be able to choose different objectives and weaponry (such as UAVs, artillery, and air support) according to their play style.