The incorporation of Tibet into the People's Republic of China (called 'Chinese invasion of Tibet' by Tibetan Government in Exile ; called 'peaceful liberation of Tibet' in China) was the process by which the People's Republic of China (PRC) gained control of Tibet. These regions came under the control of China after attempts by the Government of Tibet to gain international recognition, efforts to modernize its military, negotiations between the Government of Tibet and the PRC, a military conflict in the Qamdo area of Western Kham in October 1950, and the eventual acceptance of the Seventeen Point Agreement by the Government of Tibet under Chinese pressure in October 1951. In the West, it is generally believed that China annexed Tibet. The Government of Tibet and Tibetan social structure remained in place in the Tibetan Autonomous Region under the authority of China until the 1959 Tibetan uprising, when the Dalai Lama fled into exile and after which the Government of Tibet and Tibetan social structures were dissolved.
In 1913, shortly after the British invasion of Tibet in 1904, the creation of the position of British Trade Agent at Gyantse and the Xinhai Revolution in 1911, most of the area comprising the present-day Tibetan Autonomous Region (TAR) (Ü-Tsang and western Kham) became de facto independent from the rest of present-day China under a British protectorate, with the rest of the present day TAR coming under Tibetan Government rule by 1917. Some border areas with high ethnic Tibetan populations (Amdo and Eastern Kham) remained under Kuomintang or local warlord control.
The TAR region is also known as "Political Tibet", while all areas with a high ethnic Tibetan population are collectively known as "Ethnic Tibet". Political Tibet refers to the polity ruled continuously by Tibetan governments since earliest times down to 1951, whilst ethnic Tibet refers to regions north and east where Tibetans historically predominated but where, down to modern times, Tibetan jurisdiction was irregular and limited to just certain areas.
At the time Political Tibet obtained de facto independence, its socio-economic and political systems resembled Medieval Europe. Attempts by the 13th Dalai Lama between 1913 and 1933 to enlarge and modernize the Tibetan military had eventually failed, largely due to opposition from powerful aristocrats and monks. The Tibetan government had little contact with other governments of the world during its period of de facto independence, with some exceptions, notably India, Great Britain, and the United States. This left Tibet diplomatically isolated and cut off to the point where it could not make its positions on the issues well known to the international community and it was restricted by treaties that gave the British Empire authority over taxes, foreign relations and fortifications.
In July 1949, in order to prevent Chinese agitation in political Tibet, the Tibetan government expelled the (Nationalist) Chinese delegation. In November 1949, it sent a letter to the US State Department and a copy to Mao Zedong, and a separate letter to Great Britain, declaring its intent to defend itself "by all possible means" against PRC troop incursions into Tibet.
In the preceding three decades, the conservative Tibetan government had consciously deemphasized its military and refrained from modernizing. Hasty attempts at modernizing and enlarging the military began in 1949, but proved mostly unsuccessful on both counts, It was too late to raise and train an effective army. India did provide some small arms aid and military training, however the PLA remained much larger, better trained, better led, better equipped, and more experienced than the Tibetan army.
In 1950, the 14th Dalai Lama was 15 years old and had not attained his majority, so Regent Taktra was the acting head of the Tibetan Government. The period of the Dalai Lama’s minority is traditionally one of instability and division, and the division and instability were made more intense by the recent Reting conspiracy and a 1947 regency dispute.
Both the PRC and their predecessors the Kuomintang had always maintained that Tibet was a part of China. The PRC also proclaimed an ideological motivation to liberate the Tibetans from a theocratic feudal system. In September 1949, shortly before the proclamation of the People’s Republic of China, the Chinese Communist Party (CCP) made it a top priority to incorporate Tibet, Taiwan, Hainan Island, and the Pescadores into the PRC, peacefully or by force. Because Tibet was unlikely to voluntarily give up its de facto independence, Mao in December 1949 ordered that preparations be made to march into Tibet at Qamdo (Chamdo), in order to induce the Tibetan Government to negotiate. The PRC had over a million men under arms and had extensive combat experience from the recently concluded Chinese Civil War.
On 7 March, a Tibetan delegation arrived in Kalimpong to open a dialogue with the newly declared PRC and to secure assurances that the PRC would respect Tibetan "territorial integrity", among other things. The onset of talks was delayed by debate between the Tibetan delegation, India, Britain, and the PRC about the location of the talks. Tibet favored Singapore or Hong Kong (not Beijing, at the time called Peking), Britain favored India (not Hong Kong or Singapore), India and the PRC favored Beijing, but India and Britain preferred no talks at all. The Tibetan delegation did eventually meet with the PRC’s ambassador General Yuan Zhongxian in Delhi on 16 September 1950. Yuan communicated a 3-point proposal that Tibet be regarded as part of China, that China be responsible for Tibet’s defense, and that China be responsible for Tibet’s trade and foreign relations. Acceptance would lead to peaceful Chinese sovereignty, or otherwise war. The Tibetans undertook to maintain the relationship between China and Tibet as one of priest-patron:
"Tibet will remain independent as it is at present, and we will continue to have very close 'priest-patron' relations with China. Also, there is no need to liberate Tibet from imperialism, since there are no British, American or Guomindang imperialists in Tibet, and Tibet is ruled and protected by the Dalai Lama (not any foreign power)" - Tsepon W. D. Shakabpa
They and their head delegate Tsepon W. D. Shakabpa, on 19 September, recommended cooperation, with some stipulations about implementation. Chinese troops need not be stationed in Tibet, it was argued, since it was under no threat, and if attacked by India or Nepal could appeal to China for military assistance. While Lhasa deliberated, on 7 October, Chinese troops advanced into eastern Tibet, crossing the border at 5 places. The purpose was not to invade Tibet 'per se' but to capture the Tibetan army in Chamdo, demoralize the Lhasa government, and thus exert powerful pressure to send negotiators to Beijing to sign terms for a handover of Tibet. On 21 October, Lhasa instructed its delegation to leave immediately for Beijing for consultations with the Communist government, and to accept the first provision, if the status of the Dalai Lama could be guaranteed, while rejecting the other two conditions. It later rescinded even acceptance of the first demand, after a divination before the Six-Armed Mahākāla deities indicated that the three points could not be accepted, since Tibet would fall under foreign domination.
After months of failed negotiations, attempts by Tibet to secure foreign support and assistance, PRC and Tibetan troop buildups, the People's Liberation Army (PLA) crossed the Jinsha River on 6 or 7 October 1950. Two PLA units quickly surrounded the outnumbered Tibetan forces and captured the border town of Qamdo by 19 October, by which time 114 PLA soldiers and 180 Tibetan soldiers had been killed or wounded. Writing in 1962, Zhang Guohua claimed "over 5,700 enemy men were destroyed" and "more than 3,000" peacefully surrendered. Active hostilities were limited to a border area northeast of the Gyamo Ngul Chu River and east of the 96th meridian. After capturing Qamdo, the PLA broke off hostilities, sent a captured commander, Ngabo, to Lhasa to reiterate terms of negotiation, and waited for Tibetan representatives to respond through delegates to Beijing.
The PLA sent released prisoners (among them Ngapoi Ngawang Jigme, a captured governor) to Lhasa to negotiate with the Dalai Lama on the PLA's behalf. Chinese broadcasts promised that if Tibet was "peacefully liberated", the Tibetan elites could keep their positions and power.
Tibetan negotiators were sent to Beijing and presented with an already-finished document commonly referred to as the Seventeen Point Agreement. There was no negotiation offered by the Chinese delegation; although the PRC stated it would allow Tibet to reform at its own pace and in its own way, keep internal affairs self-governing and allow religious freedom, it would also have to agree to be part of China. The Tibetan negotiators were not allowed to communicate with their government on this key point, and pressured into signing the agreement on 23 May 1951, despite never having been given permission to sign anything in the name of the government. This was the first time in Tibetan history its government had accepted - albeit unwillingly - China's position on the two nations' shared history  Tibetan representatives in Beijing and the PRC Government signed the Seventeen Point Agreement on 23 May 1951, authorizing the PLA presence and Central People's Government rule in Political Tibet. The terms of the agreement had not been cleared with the Tibetan Government before signing and the Tibetan Government was divided about whether it was better to accept the document as written or to flee into exile. The Dalai Lama, who by this time had ascended to the throne, chose not to flee into exile, and formally accepted the 17 Point Agreement in October 1951. According to Tibetan sources, on 24 October, on behalf of the Dalai Lama, general Zhang Jingwu sent a telegram to Mao Zedong with confirmation of the support of the Agreement, and there is evidence that Ngapoi Ngawang Jigme simply came to Zhang and said that the Tibetan Government agreed to send a telegram on 24 October, instead of the formal Dalai Lama's approval. Shortly afterwards, the PLA entered Lhasa. The subsequent incorporation of Tibet is officially known in the People's Republic of China as the Peaceful Liberation of Tibet (Chinese: 和平解放西藏地方), promoted by the state media.
For several years the Tibetan Government remained in place in the areas of Tibet where it had ruled prior to the outbreak of hostilities, except for the area surrounding Qamdo that was occupied by the PLA in 1950, which was placed under the authority of the Qamdo Liberation Committee and outside the Tibetan Government's control. During this time, areas under the Tibetan Government maintained a large degree of autonomy from the Central Government and were generally allowed to maintain their traditional social structure.
In 1956, Tibetan militias in the ethnically Tibetan region of eastern Kham just outside the Tibetan Autonomous Region, spurred by PRC government experiments in land reform, started fighting against the government. The militias united to form Chushi Gangdruk Volunteer Force. When the fighting spread to Lhasa in 1959, the Dalai Lama fled Tibet. Both he and the PRC government in Tibet subsequently repudiated the 17 Point Agreement and the PRC government in Tibet dissolved the Tibetan Local Government.
The legacy of this action continues decades later. Jamling Tenzing Norgay, the son of Tibetan born Tenzing Norgay who was one of the first two individuals known to summit Mount Everest, said in his book, "I felt fortunate to have been born on the south side of the Himalaya, safe from the Chinese invasion of Tibet."
It was evident that the Chinese were not prepared to accept any compromises and that the Tibetans were compelled, under the threat of immediate armed invasion, to sign the Chinese proposal.