BSI's MACE (Modern Air Combat Environment) is a physics-based, full spectrum Computer Generated/Semi-Automated Forces (CGF/SAF) application with a large and user-extensible order of battle, capable of many-on-many simulation yet having very high fidelity at the engagement level. MACE can simulate advanced, 5th generation systems including low observable platforms and Active and Passively Electronically Scanned Arrays (AESA and PESA radar) as well as highly contested battlespaces. MACE supports the Distributed Interactive Simulation (DIS) architecture including simulation management, entity state, fire, detonate and emissions PDUs. MACE is ideally suited for both stand-alone scenario creation/mission rehearsal and distributed mission simulation. MACE is certified for use on the USAF’s Distributed Mission Operations Network (DMON) and is a Combat Air Force Distributed Mission Operations (CAF DMO) approved CGF/SAF. MACE also supports CIGI, TENA and HLA architectures.