The Warrior diet was conceived by Ori Hofmekler, a former member of the Israeli Defense Force. This is one of the first fasting protocols, when nobody else was discussing intermittent fasting.
The idea came as a result of Hofmekler’s personal experience in the army. He observed that when he ate only at night, when he could rest, he had more energy, and he could focus better. After doing some research, he found out that this was the way of life of the ancient warriors, and he adopted the feeding schedule in his life after army.
The schedule is rather simple, you only eat at night before going to bed, and you eat as much as you want. The protocol though, involves intense exercising, and a specific diet which aligns with other current healthy eating trends. This program is probably not for those seeking to lose weight, and is more appropriate for athletes. Here is a great, comprehensive, impartial article on the Warrior Diet.