再造王室：劉裕討桓集團的構成

Reconstruction the royal: the foundation of the power in Liu-Yu gathering the forces against Huan-Hsuan

劉裕，本是晉末形勢遽變下，北府軍團裡的一位中階軍官，因為跟著軍將劉牢之血戰沙場，逐漸累積起個人的威望，桓玄職掌朝政後，北府高階將官幾乎被屠戮殆盡，因緣際會下成為北府餘部的領袖。逮至桓玄篡晉，欲振興皇權，政權結構裡的權力關係失衡，經濟利益和政治權力的分配不均，促使劉裕起兵討桓。現今多以門第階層的角度，來詮釋晉末政局的動盪，認為這是場士族與寒門之爭。
實際上，劉裕討桓集團的成員頗為複雜，有北府將士、江東豪望、僑姓士族官僚等等，意識型態截然不同的各股勢力。若以權力的視野來觀察，劉裕是以共享政治利益的方式，凝聚討桓集團共識，重新組成政權裡的核心勢力，整合起吳姓與僑姓、士族與寒門、武將與文官，一同進而再造王室。

Liu-Yu who was originally a middle-ranking officer in Pei-Fu（北府）army. He gradually accumulated his personal prestige while following his general Liu-Laozhi in many fierce battles. After Huan-Hsuan being in charge of the affairs of the state, high-ranking officers were slaughtered totally.
Liu-Yu coincidentally became the leader of the remnants of Pei-Fu. It was until Huan-Hsuan usurped Chin that he wanted to invigorate the imperial power. However, the relationship of power in the structure of the regime lost its balance with the economic benefit and the political power being distributed unfairly became the causes for Liu-Yu to integrate the completely different ideology from the Wus（吳姓）, the Chiaos（僑姓） , the gentry clans , the humble family ,the Pei-Fu army, and the bureaucracy system etc. to suppress Huan-Hsuan .
This essay aims at Liu-Yu integrating the causes from Pei-Fu generals,Chiang-Tung（江東） prominent family and the bureaucrats and analyzing how to have the coherence against Huan-Hsuan . Thus, he can reconstruct the core power in the regime to Reconstruction the royal.