Photos: US, ROK Armies battle mock enemy

A U.S. Army Soldier scans the area for threats as part of an opposition forces scenario during Operational Readiness Exercise Beverly Bulldog 14-02 at Osan Air Base, Republic of Korea, May 7, 2014. Several Soldiers, including a few from the ROK army, participated in a mock battle with role players near the 3rd Battlefield Coordination Detachment Headquarters. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

A U.S. Army Soldier scans the area for threats as part of an opposition forces scenario during Operational Readiness Exercise Beverly Bulldog 14-02 at Osan Air Base, Republic of Korea, May 7, 2014. Several Soldiers, including a few from the ROK army, participated in a mock battle with role players near the 3rd Battlefield Coordination Detachment Headquarters. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

A U.S. Army Soldier “checks his six” while participating in an opposition forces scenario during Operational Readiness Exercise Beverly Bulldog 14-02 at Osan Air Base, Republic of Korea, May 7, 2014. Osan participates in several 51st Fighter Wing-specific and peninsula-wide OREs, like BB 14-02, every year. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

A U.S. Army Soldier “checks his six” while participating in an opposition forces scenario during Operational Readiness Exercise Beverly Bulldog 14-02 at Osan Air Base, Republic of Korea, May 7, 2014. Osan participates in several 51st Fighter Wing-specific and peninsula-wide OREs, like BB 14-02, every year. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

Republic of Korea army Cpl. Sang Woo Kang waits for mock opposition forces members to give away their position during Operational Readiness Exercise Beverly Bulldog 14-02 at Osan Air Base, ROK, May 7, 2014. Role players ambushed Soldiers from the U.S. and ROK Armies and engaged in a mock firefight in attempt to gain control of the area around the 3rd Battlefield Coordination Detachment Headquarters. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

Republic of Korea army Cpl. Sang Woo Kang waits for mock opposition forces members to give away their position during Operational Readiness Exercise Beverly Bulldog 14-02 at Osan Air Base, ROK, May 7, 2014. Role players ambushed Soldiers from the U.S. and ROK Armies and engaged in a mock firefight in attempt to gain control of the area around the 3rd Battlefield Coordination Detachment Headquarters. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

Role players act as fallen opposition forces members during Operational Readiness Exercise Beverly Bulldog 14-02 at Osan Air Base, Republic of Korea, May 7, 2014. OREs are a unique opportunity for Airmen and U.S. Army Soldiers to practice skills needed to survive in real-world contingency operations. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

Role players act as fallen opposition forces members during Operational Readiness Exercise Beverly Bulldog 14-02 at Osan Air Base, Republic of Korea, May 7, 2014. OREs are a unique opportunity for Airmen and U.S. Army Soldiers to practice skills needed to survive in real-world contingency operations. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

Spent shell casings from blank rounds cover the mock battlefield after a scenario during Operational Readiness Exercise Beverly Bulldog 14-02 at Osan Air Base, Republic of Korea, May 7, 2014. Facilitators often employ blank rounds and smoke grenades during opposition forces training exercises to help participants become accustomed to the sights and sounds of an enemy engagement. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

Spent shell casings from blank rounds cover the mock battlefield after a scenario during Operational Readiness Exercise Beverly Bulldog 14-02 at Osan Air Base, Republic of Korea, May 7, 2014. Facilitators often employ blank rounds and smoke grenades during opposition forces training exercises to help participants become accustomed to the sights and sounds of an enemy engagement. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

Republic of Korea army Cpl. Sang Woo Kang guards an entry control point after a mock opposition forces scenario during Operational Readiness Exercise Beverly Bulldog 14-02 at Osan Air Base, ROK, May 7, 2014. The U.S. and ROK militaries frequently train together to mimic the flow of operations in a real-world situation. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)

Republic of Korea army Cpl. Sang Woo Kang guards an entry control point after a mock opposition forces scenario during Operational Readiness Exercise Beverly Bulldog 14-02 at Osan Air Base, ROK, May 7, 2014. The U.S. and ROK militaries frequently train together to mimic the flow of operations in a real-world situation. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)