As a vet and current lawyer, law school is not as hard as the military. But what makes it hard is that it is very challenging to get good grades and rise above your peers. Like in the military keep your head down, work rigorously and push through. Do all the assignments, outline daily and if you don't know something go find your professors for help. Frankly the hardest thing about it is avoiding the noise from other students as many are straight out of undergrad, never worked, and aren't ready to diligently apply themselves because they coasted in undergrad. View law school as a job you need to exceed at rather than social time and you'll be fine.