usurpation
n. 篡奪
1. entry to another's property without right or permission
2. wrongfully seizing and holding (an office or powers) by force (especially the seizure of a throne or supreme authority);
Liu Cao Cao's usurpation of the world, called the history of infidelity.
曹操篡奪了劉家的天下, 歷史稱之為不忠.