Australian military police vehicles rest parked outside of a command post as Australian Defence Force and U.S. Marine military police officers of Combat Logistics Battalion 31, 31st Marine Expeditionary Unit respond to a call at an exercise scenario during Exercise Talisman Sabre 2011. Australian Defence Forces and U.S. Marine military police officers of Combat Logistics Battalion 31, 31st Marine Expeditionary Unit are cross training in order to learn from each other and improve their law enforcement skills. TS11 is a biennial training event aimed at improving and validating the Australian Defence Force and the United States combat readiness and interoperability as a joint task force.