Flag of Maasai national movement. "Nations Without States" (James Minahan, 1996) describes a flag purportedly of the Maasai national movement. It is red with a black and white Maasai shield in the center, and white, crossed spears behind the shield.
https://www.fotw.info/flags/tz%7D.html#ma; https://commons.wikimedia.org/wiki/File:Flag_of_Kenya.svg ; https://commons.wikimedia.org/wiki/File:Kenya_presidential_standard_MWAI_KIBAKI.svg