The Punisher is the recipient of intense infantry training from the United States Marine Corps and special operations training by Force Recon. As a Marine he went through Airborne School, Ranger School, SERE, BUDs, and the Q-Course; as well as cross-training with the Australian SASR during the Vietnam War. From this training, the Punisher is proficient in not only basic infantry and special operations skills, but the use and maintenance of specialized firearms, equipment, and explosive ordnance. He is highly trained in infiltration into heavily guarded enemy territories and structures for the purpose of assassination, capture, and military intelligence. As a Scout/Sniper he is highly trained in various forms of camouflage and stealth in different environments. He is also highly proficient at hand-to-hand combat, and has been trained in multiple forms of martial arts such as Chin Na, Hwa Rang Do, Krav Maga, Muay Thai, Nash Ryu Jujutsu, Ninjutsu, Shorin-ryu Karate and Systema. Both Nick Fury and Tony Stark have commented on how extraordinarily high his pain tolerance is. He refuses to take painkillers, as he feels that their benefit of dulling pain is not worth the side effects of drowsiness and slowed reflexes.