U.S. Army Soldiers of the 54th Brigade Engineer Battalion apply comoflauge prior to a situational training lane during Immediate Response 15 in Sjunj, 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.