if riots take place in one of your cities, it is because your loyalty is at 0 over a certain period of time... to raise loyalty, click on your town hall and perform a comforting called prayer, which will raise your loyalty by 25 and lower grievance by 5
Evony happened in 2009.
Peekskill Riots happened in 1949.
Yizhou riots happened in 2002.
Rodney Riots happened in 1968.
Ådalen riots happened in 1931.
Bellingham riots happened in 1907.
Canboulay Riots happened in 1881.
Rebecca Riots happened in 1842.
Mangalmé riots happened in 1965.
Bristol riots happened in 1793.
Orange Riots happened in 1870.
Potato Riots happened in 1834.