Gojong of Korea in the context of "Kapsin Coup"

Korea is a peninsular region in East Asia consisting of the Korean Peninsula, Jeju Island, and smaller islands. Since the end of World War II in Asia in 1945, it has been politically divided at or near the 38th parallel between North Korea (Democratic People's Republic of Korea; DPRK) and South Korea (Republic of Korea; ROK). Both countries proclaimed independence in 1948, and the two countries fought the Korean War from 1950 to 1953. The region is bordered by China to the north and Russia to the northeast, across the Amnok (Yalu) and Duman (Tumen) rivers, and is separated from Japan to the southeast by the Korea Strait.

Known human habitation of the Korean peninsula dates to 40,000 BC. The kingdom of Gojoseon, which according to tradition was founded in 2333 BC, fell to the Han dynasty in 108 BC. It was followed by the Three Kingdoms period, in which Korea was divided into Goguryeo, Baekje, and Silla. In 668 AD, Silla conquered Baekje and Goguryeo with the aid of the Tang dynasty, forming Unified Silla; Balhae succeeded Goguryeo in the north. In the late 9th century, Unified Silla collapsed into three states, beginning the Later Three Kingdoms period. In 918, Goguryeo was resurrected as Goryeo, which achieved what has been called a "true national unification" by Korean historians, as it unified both the Later Three Kingdoms and the ruling class of Balhae after its fall. Goryeo, whose name developed into the modern exonym "Korea", was highly cultured and saw the invention of the first metal movable type. During the 13th century, Goryeo became a vassal state of the Mongol Empire. Goryeo overthrew Mongol rule before falling to a coup led by General Yi Seong-gye, who established the Joseon dynasty in 1392. The first 200 years of Joseon were marked by peace; the Hangul, the Korean alphabet was created and Confucianism became influential. This ended with Japanese and Qing invasions, which brought devastation to Joseon and led to Korean isolationism. After the invasions, an isolated Joseon experienced another nearly 200-year period of peace and prosperity, along with cultural and technological development. In the final years of the 19th century, Japan forced Joseon to open up and Joseon experienced turmoil such as the Kapsin Coup, Donghak Peasant Revolution, and the assassination of Empress Myeongseong. In 1895, Japan defeated China in the First Sino-Japanese War and China lost suzerainty over Korea and Korea was placed under further Japanese influence. In 1897, the centuries old Joseon was replaced by the Korean Empire with the Joseon's last king, Gojong, becoming the Emperor of the Korean Empire. Japan's further victory in the 1904–1905 Russo-Japanese War, expelled Russian influence in Korea and Manchuria. In 1905, the Korean Empire became a protectorate of the Empire of Japan. In 1910, the Empire of Japan officially annexed the Korean peninsula.

The Korean Empire, officially the Empire of Korea or Imperial Korea, was a Korean monarchical state proclaimed in October 1897 by King Gojong of the Joseon dynasty. The empire lasted until the Japanese annexation of Korea in August 1910.

During this period, Emperor Gojong oversaw the Gwangmu Reform, a partial modernization and westernization of Korea's military, economy, land system, education system, and various industries. In 1905, the Korean Empire became a protectorate of the Empire of Japan. After the Japanese annexation in 1910, the Korean Empire ceased to exist.

The First Sino-Japanese War (25 July 1894 – 17 April 1895), or the First China–Japan War, was a conflict between the Qing dynasty of China and the Empire of Japan primarily for influence over Korea. In Chinese it is commonly known as the Jiawu War. 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 unequal Treaty of Shimonoseki two months later, ending the war.

In the late 19th century, Korea remained one of the Qing tributary states, while Japan viewed it as a target of imperial 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 Incheon. This army moved to Seoul, seized the Korean emperor, and set up a pro-Japanese government on 23 July 1894 in the occupation of Gyeongbokgung. The Qing government decided to withdraw its troops, but rejected recognition of the pro-Japanese government, which had granted the Imperial Japanese Army the right to expel the Qing's Huai Army from Korea. About 3,000 Qing troops still remained in Korea, and could be supplied only by sea; on 25 July, the Japanese Navy won the Battle of Pungdo and sank the steamer Kowshing, which was carrying 1,200 Qing reinforcements. A declaration of war followed on 1 August.

The Kwangmu Reform (Korean: 광무개혁; Hanja: 光武改革) was a collection of reforms that were aimed at modernizing and Westernizing the Korean Empire as it felt held back from what other countries had achieved in their own process of Industrial Revolutions. It takes its name from Gojong, also known as the Gwangmu Emperor. The reforms that took place during the Gwangmu Era from 1897 to 1907 showed, in the long term, Korean potential for starting and achieving modernisation. This sort of development was unseen until the Chang Myon-era of the 1960s and 1970s. The Kwangmu reform later staged the fundamental background for future Korean development in infrastructure, reforming the economy and creating the nucleus of the modern bureaucracy and military.

The Japan–Korea Treaty of 1876 (also known as the Japan–Korea Treaty of Amity in Japan and the Treaty of Ganghwa Island in Korea) was made between representatives of the Empire of Japan and the Kingdom of Joseon in 1876. Negotiations were concluded on February 26, 1876.

In Korea, Heungseon Daewongun, who instituted a policy of increased isolationism against the European powers, was forced into retirement by his son King Gojong and Gojong's wife, Empress Myeongseong. France and the United States had already made several unsuccessful attempts to begin commerce with the Joseon dynasty during the Daewongun's era. However, after Daewongun was removed from power, many new officials took power who supported the idea of opening commerce with foreigners.

Around 6 a.m. on 8 October 1895, Queen Min, the consort of the Korean monarch Gojong, was assassinated by a group of Japanese agents under Miura Gorō. After her death, she was posthumously given the title of "Empress Myeongseong". The attack happened at the royal palace Gyeongbokgung in Seoul, Joseon. This incident is known in Korea as the Eulmi Incident.

By the time of her death, the queen had acquired arguably more political power than even her husband. Through this process, she made many enemies and escaped a number of assassination attempts. Among her opponents were the king's father the Heungseon Daewongun, the pro-Japanese ministers of the court, and the Korean army regiment that had been trained by Japan: the Hullyŏndae. Weeks before her death, Japan replaced their emissary to Korea with a new one: Miura Gorō. Miura was a former military man who professed to being inexperienced in diplomacy, and reportedly found dealing with the powerful queen frustrating. After the queen began to align Korea with the Russian Empire to offset Japanese influence, Miura struck a deal with Adachi Kenzō of the newspaper Kanjō shinpō and possibly also the Daewongun to carry out her killing.

The Japanese occupation of Gyeongbokgung Palace (Korean: 일본군의 경복궁 점령) or the Gabo Incident occurred on 23 July 1894, during the ceasefire of the Donghak Peasant Revolution and the beginning of the First Sino-Japanese War. Imperial Japanese forces led by Japanese Minister Plenipotentiary to Korea Ōtori Keisuke and Ōshima Yoshimasa occupied Gyeongbokgung palace to restore King Gojong's father Heungseon Daewongun and establish a pro-Japanese government under Kim Hong-jip and the Enlightenment Party's administration.