Mentor's Vision Army Sgt. Samuel Benton observes and mentors soldiers during the Bull Run V training exercise with Battle Group Poland in Olecko, Poland, May 22, 2018. In a Dec. 6, 2018, interview as part of the Washington Post’s “Transformers” series, Marine Corps Gen. Joe Dunford, chairman of the Joint Chiefs of Staff, discussed the need for the United States to retain its military advantage amid near-peer competition from Russia and China. SHARE: Download: Full Size (2.87 MB) Tags: Army, DOD in Photos Credit: Army Spc. Hubert D. Delany III VIRIN: 180522-A-AM237-1443C.JPG Photo Gallery