What is the toughest branch in the military?

The USMC is currently the most difficult to get into. USMC basic training is arguably the hardest boot camp of all branches.

Sorry dude, but SEAL training is ridiculously hard, and even though Marines definitely train like hell, SEALs take the cake. Also, surprisingly few people are actually kicked out SEAL training, the vast majority D.O.R. (drop on request) cause it's too hard.

SEAL training is SPECIAL FORCES. Look at the answer: toughest BOOT CAMP (BASIC). No doubt SEAL training is the toughest but, for basic the CORPS is the toughest, even SEALS have to go through BASIC.

I agree. The Marine boot camp is the toughest. *Comment from personal experiance. ;)