Capture of Chusan

First Capture of Chusan
	Part of the First Opium War
	; British and Chinese officials on board HMS Wellesley on 4 July 1840. Karl Gützlaff (centre) served as interpreter.
Date	5–6 July 1840
Location	Zhoushan, Zhejiang, China30°0′24″N 122°6′24″E / 30.00667°N 122.10667°E
Result	British victory
Belligerents
United Kingdom British East India Company;	Qing China
Commanders and leaders
Gordon Bremer; George Burrell	Zhang Chaofa (DOW)
Strength
1 ship of the line; 3 corvettes; 2 sloops; 2 steamships; 10 gun-brigs/transport ships; 10 guns; 2 mortars (on land)	21 junks; 1,540; 20 guns (on land)
Casualties and losses
1 wounded	13 killed; 13 wounded; 91 guns captured

The First Capture of Chusan (Chinese: 第一次定海之戰) by British forces in China occurred on 5–6 July 1840 during the First Opium War. The British captured Chusan (Zhoushan), the largest island of an archipelago of that name.