Abstract: The expedition to Derna is an American military action of 1805 in the first Barbary war. The whole military action from planning to implementation, which lasted more than four years, is the first authorized action by the government of the United States, which was directly involved in the leadership of overseas military operations. In planning the operation, the United States always advertised her “justice”. But behind the actual results, there is a lot of reality. It also profoundly reflects the American foreign activities under “justice”, “freedom”. The basic core is of self interests.

Key words: the United States, Derna, Tripoli, William Eaton, the First Barbary War

摘要： 1805年远征德尔纳是美国在第一次巴巴里战争中的一次重要军事行动。此次行动从策划到实施历时四年多，是美国历史上首次由政府授权并由美国人直接参与领导的海外军事行动。在策划过程中美国一直标榜自身的“正义”性，但实际行动结果却存在着很大的现实性；同时反映了美国在“正义”“自由”宣扬下的对外活动根本是以自身利益为核心。

关键词: 美国, 德尔纳, 的黎波里, 威廉·伊顿, 第一次巴巴里战争