PATROL BASE GHARDAI, Afghanistan – In two embedded assignments in Helmand province this year, I’ve heard a lot from Marines about how much the Afghan National Security Forces have improved. Frequently, that holds true. Generally, they seem far more willing to patrol and stand up to the Taliban now than they did in 2010, when I saw regular tensions between Marines and soldiers with the Afghan National Army in Marjah, a district that was rife with violence at the time. Sometimes, you see the flip side, though. And today was one of those days. A team with Marine Border Adviser…