Someone above said digging the tanks in is a sign of weakness. In my opinjion, it is a sign of good tactical discipline and experience. Any time a military unit halts in hostile territory, they should immediately start improving their position in case they have to fight there. It takes combat experience to get that internalized into the rank and file. Most soldiers want to flop and light up, at least until the first time they get hit while taking a break. After that, the survivors dig in first, then smoke and flop.