Question: What feudal domain did William Henry Harrison Seeley fight against?
Related documents: [0]  [DOC] William Henry Harrison Seeley, VC (1 May 1840 – 1 October 1914) was an American who fought with the British Royal Navy during the Shimonoseki Campaign in Japan and was a recipient of the Victoria Cross (VC), the highest award for gallantry in the face of the enemy that can be awarded to British and Commonwealth forces. He was the first American-born recipient of the VC. [END] 
[1]  [DOC] The Shimonoseki Campaign (Japanese: 下関戦争/馬関戦争 , Hepburn: Shimonoseki Sensō/Bakan Sensō , lit. "Shimonoseki War") refers to a series of military engagements in 1863 and 1864, fought to control Shimonoseki Straits of Japan by joint naval forces from Great Britain, France, the Netherlands and the United States, against the Japanese feudal domain of Chōshū, which took place off and on the coast of Shimonoseki, Japan. [END] 
Answer: 
Chōshū
Chōshū