Question: The Northeast People's Anti-Japanese Volunteer Army was confined by what country?

Context paragraphs:
Northeast People's Anti-Japanese Volunteer Army: The Northeast People's Anti-Japanese Volunteer Army was led by Tang Juwu, formerly the commander of a Northeastern infantry regiment, interned by the Japanese at the beginning of the invasion of Manchuria.  It was created by the Northeast National Salvation Society that had appointed Tang as commander following his escape from the Japanese, and helped him link with the local forces which others were organising.  Tang also made use of his personal contacts with police chiefs, officials, local gentry militias and the leaders of the Big Swords Society.  Tang was able to organize a force which threatened the region to the east of Mukden and communications with Korea.

Pacification of Manchukuo: The Pacification of Manchukuo was a Japanese anti-insurgency campaign during the Second Sino-Japanese War to suppress any armed resistance to the newly established puppet state of Manchukuo from various anti-Japanese volunteer armies in occupied Manchuria and later the Communist Northeast Anti-Japanese United Army.  The operations were carried out by the Imperial Japanese Kwantung Army and the collaborationist forces of the Manchukuo government from March 1932 until 1942, and resulted in a Japanese victory.

Dalforce: Dalforce, or the Singapore Overseas Chinese Anti-Japanese Volunteer Army (星华义勇军; "Xinghua Yi Yong Jun") was an irregular forces/guerrilla unit within the British Straits Settlements Volunteer Force during World War II.  Its members were recruited among the ethnic Chinese people of Singapore.  It was created on 25 December 1941 by Lieutenant Colonel John Dalley of the Federated Malay States Police Force.  The unit was known to the British colonial administration as Dalforce, after its chief instructor and commanding officer, John Dalley, whereas the Chinese in Singapore only knew it as the Singapore Overseas Chinese Anti-Japanese Volunteer Army.  This formation took part in the Battle of Singapore and some members conducted a guerrilla campaign against Japanese forces during the Japanese occupation.

Northeastern People's Revolutionary Army: After the Empire of Japan invaded and occupied the Northeast in 1931, the Chinese Communist Party organized small anti-Japanese guerrilla units, and formed their own Northeastern People's Revolutionary Army, dedicated to social revolution, but these were dwarfed by the Anti-Japanese Volunteer Armies which had been raised by their anti-Japanese, patriotic appeal.

Jilin Self-Defence Army: The Jilin Self-Defence Army was an anti-Japanese volunteer army formed to defend local Chinese residents against the Japanese invasion of northeast China.  General Ting Chao, Li Du, Feng Zhanhai, Xing Zhanqing, and Zhao Yi organised the Jilin Self-Defence Army in order to prevent the fall and occupation of Harbin city, Jilin province.  This brought all their forces under a unified command.  Calling for civilians to form volunteer units and join in the defense of the city, the army reached a strength of 30,000 men in six brigades of Zhang Xueliangs Northeastern army.

Li Yanlu: Li Yanlu, 李延禄, (1895-1985), soldier, communist, and leader of anti-Japanese forces in Manchuria.  Li was born in Yenchi, Kirin (now Jilin) Province in April 1895.  He became involved in the opposition to Yuan Shikai's attempt to restore the monarchy.  He joined the Northeastern Army of the Fengtien clique in 1917, as a private soldier and rose to platoon leader then captain over the next sixteen years.  Politically he moved to the left and in July 1931 he joined the Communist Party of China.  Three months later the Japanese began the Mukden Incident and invasion of Manchuria.  Avoiding capture and internment by the Japanese, he joined the volunteer army of Wang Delin.  There Communists were welcomed and Li and Zhou Baozhong were made high-ranking officers.  Li became the chief of staff of Wang's Chinese People's National Salvation Army one of the most successful of the volunteer armies resisting the Japanese and its puppet state of Manchukuo.  He was also said to have been secretly organizing communists within the army.  Yet Party policy at the time opposed the volunteer armies and the participation of members in them and had their own Northeastern People's Revolutionary Army.  At first the Party severely criticised their conduct yet the stance of the Party prevented the growth of their own forces and did not help the anti-Japanese cause.

Internment: Internment is the imprisonment or confinement of people, commonly in large groups, without trial.  The term is especially used for the confinement "of enemy citizens in wartime or of terrorism suspects".  Thus, while it can simply mean imprisonment, it tends to refer to preventive confinement, rather than confinement "after" having been convicted of some crime.  Use of these terms is subject to debate and political sensitivities.

People's Volunteer Army: The (Chinese) People's Volunteer Army (PVA or CPVA; ) was the armed forces deployed by the People's Republic of China during the Korean War.  Although all units in the Chinese People's Volunteer Army were actually transferred from the People's Liberation Army (the official name of the Chinese armed forces) under orders of the Chinese Communist Party, the People's Volunteer Army was separately constituted in order to prevent an official war with the United States.  The People's Volunteer Army entered Korea on October 19, 1950, and completely withdrew by October 1958.  The nominal commander and political commissar of the CPVA was Peng Dehuai before the ceasefire agreement in 1953, although both Chen Geng and Deng Hua served as acting commander and commissar after April 1952 due to Peng's illness.  The initial (October 25 – November 5, 1950) units in the CPVA included 38th, 39th, 40th, 42nd, 50th, 66th Army totaling 250,000 men, and eventually about 3 million Chinese civilian and military personnel served in Korea by July 1953.

Northeast National Salvation Society: The Northeast National Salvation Society was an organization formed by exiles from Manchuria, (the Northeast) in order to put pressure on the Chinese government of Chiang Kai-shek to end its policy of non resistance to the Empire of Japan that had invaded Manchuria after the Mukden Incident and to assist the volunteer armies, especially the Northeast People's Anti-Japanese Volunteer Army in Liaoning, led by Tang Juwu.  One of its chief supporters was Zhang Xueliang who privately supported this resistance, despite his public obedience to the government policy of non resistance.  Zhang was not publicly associated with the Society and never held office in it, but provided funds and allowed it to use his name when communicating with volunteer armies.

Northeast Anti-Japanese United Army: The Northeast Anti-Japanese United Army (Chinese: 東北抗日聯軍 Korean: 동북항일연군/동북항일련군) was the main anti-Japanese guerrilla army in the northeast part (Manchuria) of China after the occupation of Manchuria by Japan in 1931.  Its predecessors were various anti-Japanese volunteer armies organized by locals and the Manchuria branches of the Chinese Communist Party.  In February 1936, the Communist Party of China, in accordance with the instructions of the Communist International, issued The Declaration of the Unified Organization of Northeast Anti-Japanese United Army and marked the official formation of the organization.

Supporting paragraphs: Northeast People's Anti-Japanese Volunteer Army Internment
Answer: the Japanese