In Qing dynasty China, the Liaodong Peninsula (simplified Chinese: 辽东半岛; traditional Chinese: 遼東半島; pinyin: Liáodōng Bàndǎo) was administratively part of Liaoning Province.
In 1882, the Beiyang Fleet established a naval base and coaling station at Lüshunkou near the southern end of the peninsula.

The Empire of Japan occupied the region during the First Sino-Japanese War (1894–1895), and under the terms of the Treaty of Shimonoseki signed by Japan and China ending the war in April 1895, Japan gained full sovereignty of the area.
However, within weeks, Germany, France and Russia pressured Japan to cede the territory back to China, in what was called the Triple Intervention.

 
In December 1897, Russian naval vessels entered Lüshunkou harbor, which they began to use as a forward base of operations for patrols off of northern China, Korea and in the Sea of Japan.
 The Russian Empire renamed the harbor Port Arthur.
 In March 1898 Russia formally leased the region for 25 years from China.
 The leased area extended to the northern shore of Yadang Bay on the western side of the peninsula; on the eastern side it reached Pikou; Yevgeni Ivanovich Alekseyev, chief of Russian Pacific Fleet, became the head of this territory.
The peninsula north of the lease was made a neutral territory in which China agreed not to offer concessions to other countries.
 In 1899, Russia founded the town of Dalniy (meaning "distant" or "remote"), just north of the naval base at Port Arthur.
This would later become the city of Dalian (Dairen).

In 1898 Russia began building a railroad north from Port Arthur to link Dalniy with the Chinese Eastern Railway at Harbin; this spur line was the South Manchurian Railway.

Under the Portsmouth Treaty (1905) resulting from the Russo-Japanese War, Japan replaced Russia as leaseholder.
Port Arthur was renamed Ryojun(旅順), and Dalniy was renamed Dairen(大連).
Japan also obtained extraterritorial rights in the region north of the territory adjacent to the 885 kilometers (550 mi) South Manchurian Railway in 1905 (i.e. the South Manchuria Railway Zone), which was extended north of Mukden to Changchun.
 These rights, along with the railway and several spur lines were passed to the corporation known as the South Manchurian Railway Company.

Japan established the Kwantung Governor-general (關東都督府, Kantō Totokufu) to administer the new territory, and based the Kwantung Garrison to defend it and the railway.
The Kwantung Garrison later became the Kwantung Army, which played an instrumental role in the founding of Manchukuo.
In negotiations with the Republic of China under the Twenty-One Demands, the terms of the lease of the Kwantung Leased Territory were extended to 99 years.

After the foundation of Japanese-controlled Manchukuo in 1932, Japan regarded the sovereignty of the leased territory as transferred from China to Manchukuo.
A new lease agreement was contracted between Japan and the government of Manchukuo, and Japan transferred the South Manchurian Railway Zone to Manchukuo.
However, Japan retained the Kwantung Leased Territory as a territory apart from the nominally-independent Manchukuo until its surrender at the end of World War II in 1945.

After World War II, the Soviet Union occupied the territory and the Soviet Navy made use of the Ryojun Naval Base.
The Soviet Union turned it over to the People's Republic of China in 1955.
In Qing dynasty China, the Liaodong Peninsula (simplified Chinese: 辽东半岛; traditional Chinese: 遼東半島; pinyin: Liáodōng Bàndǎo) was administratively part of Liaoning Province. In 1882, the Beiyang Fleet established a naval base and coaling station at Lüshunkou near the southern end of the peninsula.
The Empire of Japan occupied the region during the First Sino-Japanese War (1894–1895), and under the terms of the Treaty of Shimonoseki signed by Japan and China ending the war in April 1895, Japan gained full sovereignty of the area. However, within weeks, Germany, France and Russia pressured Japan to cede the territory back to China, in what was called the Triple Intervention.
 
In December 1897, Russian naval vessels entered Lüshunkou harbor, which they began to use as a forward base of operations for patrols off of northern China, Korea and in the Sea of Japan.  The Russian Empire renamed the harbor Port Arthur.  In March 1898 Russia formally leased the region for 25 years from China.  The leased area extended to the northern shore of Yadang Bay on the western side of the peninsula; on the eastern side it reached Pikou; Yevgeni Ivanovich Alekseyev, chief of Russian Pacific Fleet, became the head of this territory. The peninsula north of the lease was made a neutral territory in which China agreed not to offer concessions to other countries.  In 1899, Russia founded the town of Dalniy (meaning "distant" or "remote"), just north of the naval base at Port Arthur. This would later become the city of Dalian (Dairen).
In 1898 Russia began building a railroad north from Port Arthur to link Dalniy with the Chinese Eastern Railway at Harbin; this spur line was the South Manchurian Railway.
Under the Portsmouth Treaty (1905) resulting from the Russo-Japanese War, Japan replaced Russia as leaseholder. Port Arthur was renamed Ryojun(旅順), and Dalniy was renamed Dairen(大連). Japan also obtained extraterritorial rights in the region north of the territory adjacent to the 885 kilometers (550 mi) South Manchurian Railway in 1905 (i.e. the South Manchuria Railway Zone), which was extended north of Mukden to Changchun.  These rights, along with the railway and several spur lines were passed to the corporation known as the South Manchurian Railway Company.
Japan established the Kwantung Governor-general (關東都督府, Kantō Totokufu) to administer the new territory, and based the Kwantung Garrison to defend it and the railway. The Kwantung Garrison later became the Kwantung Army, which played an instrumental role in the founding of Manchukuo. In negotiations with the Republic of China under the Twenty-One Demands, the terms of the lease of the Kwantung Leased Territory were extended to 99 years.
After the foundation of Japanese-controlled Manchukuo in 1932, Japan regarded the sovereignty of the leased territory as transferred from China to Manchukuo. A new lease agreement was contracted between Japan and the government of Manchukuo, and Japan transferred the South Manchurian Railway Zone to Manchukuo. However, Japan retained the Kwantung Leased Territory as a territory apart from the nominally-independent Manchukuo until its surrender at the end of World War II in 1945.
After World War II, the Soviet Union occupied the territory and the Soviet Navy made use of the Ryojun Naval Base. The Soviet Union turned it over to the People's Republic of China in 1955.
Kwantung Leased Territory