U.S. Army Pvt. 1st Class Michael Balbon of the 173rd Airborne Brigade's Headquarter Company Fires Brigade works to approve fire missions for multinational soldier operating in situational training lanes during Immediate Response 15 in Slunj, Croatia. Immediate Response 15 is a multinational, brigade-level, Command Post Exercise utilizing computer assisted simulations and field training exercises in Croatia and Slovenia.The exercises and simulations are built upon a decisive action based scenario and are designed to enhance regional stability, strengthen partner capacity and improve interoperability.