Rebellion

The act of rebelling; open and avowed renunciation of the authority of the government to which one owes obedience, and resistance to its officers and laws, either by levying war, or by aiding others to do so; an organized uprising of subjects for the purpose of coercing or overthrowing their lawful ruler or government by force; revolt; insurrection.

Open resistance to, or defiance of, lawful authority.

organized opposition to authority; a conflict in which one faction tries to wrest control from another