Center for Army Lessons Learned military analyst Capt. David Beale (right) conducts an interview with Col. Michael J. Simmering, commander, 3rd Armored Brigade Combat Team, 4th Infantry Division (3/4 ABCT) (center); and Sgt. Maj. Joseph J. Nicholson, 3/4 ABCT Operations Sergeant Major; as part of a post-deployment collection visit to Fort Carson, CO, Dec. 5, 2017. In January 2017, 3/4 ABCT, as the regionally allocated heavy brigade, deployed to support U.S. Army Europe and participate in Operation Atlantic Resolve. Observations, lessons, and best practices from this deployment will directly inform the “First 100 Days of … ” company-level and platoon-level leadership handbooks and other CALL products. (Courtesy photo by Marv Decker)