The First Sino-Japanese War (25 July 1894 – 17 April 1895), or the First China–Japan War, was a conflict between the Qing dynasty and the Empire of Japan primarily over influence in Korea.[2] After more than six months of unbroken successes by Japanese land and naval forces and the loss of the ports of Lüshunkou (Port Arthur) and Weihaiwei, the Qing government sued for peace in February 1895 and signed the unequalTreaty of Shimonoseki two months later, ending the war.
In the late 19th century, Korea remained one of China's tributary states, while Japan viewed it as its first target of expansion. In June 1894, the Qing government, at the request of the Korean emperor Gojong, sent 2,800 troops to aid in suppressing the Donghak Peasant Revolution. The Japanese considered this a violation of the 1885 Convention of Tientsin, and sent an expeditionary force of 8,000 troops, which landed at Chemulpo, moved to Seoul, seized the emperor, and set up a pro-Japanese government on 23 July 1894. The Qing government decided to withdraw its troops but rejected recognition of the pro-Japanese government, which granted the Imperial Japanese Army the right to expel the Chinese Huai Army from Korea. About 20,000 Chinese troops still remained in Korea and could be supplied only by sea; on 25 July, the Japanese Navy sank the steamer Kow-shing, which was carrying 1,200 Chinese reinforcements. A declaration of war followed on 1 August.
Following the Battle of Pyongyang on 15 September, the Chinese troops retreated to Manchuria, allowing the Japanese to take over Korea. Two days later, the Beiyang Fleet suffered a decisive defeat at the Battle of the Yalu River, with its surviving ships retreating to Port Arthur. In October 1894, the Japanese Army invaded Manchuria, and captured Port Arthur on 21 November. Japan next captured Weihaiwei on the Shandong Peninsula on 12 February 1895. This gave them control over the approaches to Beijing, and the Qing court began negotiations with Japan in early March. The war concluded with the Treaty of Shimonoseki on 17 April, which required China to pay a massive indemnity and to cede the island of Formosa (Taiwan) to Japan. Japan also gained a predominant position in Korea.
The war demonstrated the failure of the Qing dynasty's attempts to modernize its military and fend off threats to its sovereignty, especially when compared with Japan's successful Meiji Restoration. For the first time, regional dominance in East Asia shifted from China to Japan;[3] the prestige of the Qing dynasty, along with the classical tradition in China, suffered a major blow. The loss of Korea as a tributary state sparked an unprecedented public outcry[citation needed]. Within China, the defeat was a catalyst for a series of political upheavals led by Sun Yat-sen and Kang Youwei, culminating in the 1911 Revolution and ultimate end of dynastic rule in China.
^Kim, Samuel S. (2006). The Two Koreas and the Great Powers. Cambridge University Press. p. 2. doi:10.1017/cbo9780511510496. ISBN978-0-521-66899-6. Japan was at the forefront of hegemonic wars in a quest to extend the Japanese hegemony over Korea to the entire Asia-Pacific region – the Sino–Japanese War of 1894–95 to gain dominance in Korea.