Which branch of the military has the harshest training?

Hi all, I'm really into pushing my limits and I've been considering the military after high school. Out of curiosity, which branch has the reputation for the harshest and most rigorous training? I'd love to hear any stories or insights.

In terms of physical rigors, the U.S. Navy SEALs and the U.S. Army Rangers are often considered to have some of the most intense training programs. SEAL training, known as BUD/S (Basic Underwater Demolition/SEAL) training, is notoriously challenging, both physically and mentally. It includes Hell Week, which involves five and a half days of continuous training with little sleep.

Army Ranger training involves three phases: benning, mountain, and Florida. The benning phase is designed to assess a Soldier's physical stamina, and mental toughness, and establishes the tactical fundamentals required for follow-on phases of Ranger School. During the mountain phase at Camp Frank D. Merrill in the northern Georgia mountains, students receive instruction on military mountaineering tasks, mobility training, as well as techniques for employing a platoon for continuous combat patrol operations in a mountainous environment. The Florida phase focuses on the continued development of the Ranger student's combat arms functional skills. Students receive instruction on waterborne operations, small boat movements, and stream crossings upon arrival.

As for the Marines, they're known for their 13-week boot camp, distinguished by the Crucible, a 54-hour field training exercise that tests everything recruits have learned and includes a total of 48 miles of marching.

It's important to understand, though, that the "harshness" of training can be subjective and varies by individual experience. Furthermore, each branch of the military specializes in different areas, so the intensity and methodologies of their training programs significantly reflect their respective missions and roles. Therefore, it might be most beneficial for you to research more about the kind of training (and subsequent roles) that align with your personal interests and career goals. It's not only about pursuing the harshest training but finding the right fit that will develop the skills you are seeking.