Marines with Battalion Landing Team 3/1 work together to fit a tactical vehicle into a tracked vehicle for the first time here June 15. The Marines are a part of a field exercise conducted by the 11th Marine Expeditionary Unit. - Marines with Battalion Landing Team 3/1 work together to fit a tactical vehicle into a tracked vehicle for the first time here June 15. The Marines are a part of a field exercise conducted by the 11th Marine Expeditionary Unit.