Role-player interaction: Spc. Michael Ficorilli, an MP assigned to the 305th Military Police Company, Wheeling, W.Va., interacts with residents of Gerhardt, a simulated village part of Combat Support Training Exercise 86-15-03 at Fort McCoy, Wis., Au...

Litter Obstacle Course: Spc. Brenda Carobini (From the left), Sgt. Asim Fletcher, Staff Sgt. Gabriel Corti, and Pfc. Colton Johnson, all with the 485th Chemical Biological Radiological Nuclear Battalion, perform a casualty evacuation drill on a Litte...

Security: Pfc. Conway Middleton, a carpentry and masonry specialist assigned to the 461st Engineer Company, pulls security during Operation Gerhardt, a training exercise part of Combat Support Training Exercise 86-15-03. CSTX is designed to immerse u...

Vehicle Recovery: Soldiers with the 391st Forward Support Company Maintenance Platoon and 94th Regional Training Site Maintenance Company drag a pulley and winch from their wrecker to the vehicle to be recovered at Fort McCoy, Wis., as part of the Co...

Security duty: U.S. Army Reserve Sgt. Chase Torgerson, a carpentry and masonry specialist with the 461st Engineer Company, posts security during a Combat Support Training Exercise at Fort McCoy, Wis., Aug. 15. The 86th Training Division's CSTX is a m...

Fighting fire: Firefighters from multiple engineer detachments utilize a high-pressure fire hose to extinguish a flame during a training event Aug. 16 as part of the Combat Support Training Exercise (CSTX) at Fort McCoy, Wis. The training replicates ...

Building barriers: Soldiers with the 316th Engineer Company haul a log to be used as part of a road barrier built during training Aug. 17 as part of the Combat Support Training Exercise at Fort McCoy, Wis. The 84th Training Command's third and final...

FORT MCCOY, Wis. -- The Combat Support Training Exercise, a 21-day exercise also known as CSTX 86-15-03, brought more than 80 units from across the country and Puerto Rico to training areas at Fort McCoy, Wis. Hosted by the 86th Training Division, this CSTX, nicknamed "Operation Bulldog," focused on ensuring units are trained and prepared for missions around the world. This large-scale collective-training event was designed so different types of units, such as aviation and logistical support, must all work together to plan and execute a mission -- much like they would in a real-world contingency operation. CSTX is where Army Reserve units hone their skills before they deploy. These photos highlight some of the training.