Bohemia Interactive announces beta testing of Arma 3 will begin on June 25th, reports PC Gamer. They also have a details on things that will change in the beta compared with the current alpha: "Additions will include new arsenals and vehicles to test and new scenarios that include a co-op and multi-team, wave-based defense scenario. Additionally, a new “Independent” faction consisting of a military native to Altis and Stratis was mentioned. You know, in case you were tired of Blufor and Opfor."