We were the only combat units. I reported in to the LTC and asked him if he wanted me to take responsibility for base defence. He was glad to let me as he had to worry about his support mission. The remainder of the perimeter was doled out to the support units on the base. That was rough for them because they still had to perform their support missions.
War is hell.
Only a fraction of its former population remained on the base but the size was the same. I felt distinctly uncomfortable with our ability to defend in and told my battalion commander. I contacted an engineer unit and had them do some major surgery on the base resulting in a smaller perimeter and a more defensible base. It's usually easier to get forgivness than get permission. I probably wiped out several million dollar's worth of fortifications.