Who was the greatest Warrior/Soldier of all time?

Good question. I'd probably vote for Miyamoto Musashi, the famous samaurai duelist. He would tour Japan seeking opponents, most whom he would challenge and kill with a bokken, or wooden training sword. Such was his skill that he offered his opponents their choice of sword, even if it was metal (vs. his bokken). He fought in over 60 duels and never lost, dying from what was presumed to be thoracic cancer at age 61.