the use of words or actions that are intended to encourage people to oppose a government (Oxford)
language or behaviour that is intended to persuade other people to oppose their government (Cambridge)
Government is imposing sedition laws. (Oxford)
He himself was tried for sedition and sentenced to ten years in jail. (Cambridge)
imposing sedition laws
sedition trial
Mutiny
Treason
Submission
Obedience
Seditious