What is the significance of "Right Hand Man"

Im sure its "very important assistant who helps someone do a job He/She is the CEO's right-hand man." Sorry if get it wrong!

the american revolution was by the middle and upper class, and the french was by the lower and middle class.

frederick william of brandenburg-prussia trained his son, frederick, to be a hardy soldier. but frederick disliked rifle shooting and horseback riding. unlike his father, he was interested in french literature. he enjoyed poetry and music and, like some others of the enlightenment, he scoffed at religion. his father thought him soft, frivolous and unmindful of his duties. and when frederick refused to put his signature on a right to succession, for a few moments his father strangled him.