What man, also known as mi Sde-Or, created a military self-defense system developed for the Israel Defense Forces?
Imi Lichtenfeld: Emrich "Imi" Lichtenfeld (May 26, 1910 – January 9, 1998) was a Hungarian-born Israeli martial artist who founded the Krav Maga self-defense system. Imi Lichtenfeld:  He was also known as Imi Sde-Or, the Hebrew calque of his surname.
i don't know