If he tries to get rid of the woke DEI in the army? Yes. I think they already sued (and lost?) about him removing Trannies from the military.
As far gone as some of them are, I'm surprised they haven't sued suggesting the Founding Fathers never intended the US military to have assault weapons and "we in the government should be the first to uphold the reasonable restrictions the 2nd Amendment places on the citizenry."
If we ever get into a military conflict and it's not a Uniparty man in charge, expect these fuckers to sue every step of the way. The template has been created. "Well akshually, the power we delegated to the executive shouldn't have been." "Well akshually, using drones is cruel and unusual." "Well akshually, conscientious objektorz can just say they refuse to do any combat work in the military, and you can't throw Shaniqua out." "Well askhually, putting our troops on the ground is putting them in danger and they never signed up for that."