U.S. Army Pfc. Daniel J. Ackerman, left, and Cpl. Frank P. Perretta watch for enemy activity during a combined training exercise with Lithuanian troops as part of Operation Atlantic Resolve on Pabrade training area in Lithuania, March 4, 2015. U.S. Army Europe led the combined training exercise across Estonia, Latvia, Lithuania and Poland. U.S. Army Pfc. Daniel J. Ackerman, left, and Cpl. Frank P. Perretta watch for enemy activity during a combined training exercise with Lithuanian troops as part of Operation Atlantic Resolve on Pabrade training area in Lithuania, March 4, 2015. U.S. Army Europe led the combined training exercise across Estonia, Latvia, Lithuania and Poland. SHARE: Download: Full Size (0.77 MB) Tags: Photo Essays Credit: VIRIN: 271766-Q-TLD01-075.jpg Photo Gallery