Question: When was Liang Ji's country divided into spheres of influence?

full_context: Document 1: Han dynasty: General Dong Zhuo (d. 192 AD) found the young emperor and his brother wandering in the countryside. He escorted them safely back to the capital and was made Minister of Works, taking control of Luoyang and forcing Yuan Shao to flee. After Dong Zhuo demoted Emperor Shao and promoted his brother Liu Xie as Emperor Xian, Yuan Shao led a coalition of former officials and officers against Dong, who burned Luoyang to the ground and resettled the court at Chang'an in May 191 AD. Dong Zhuo later poisoned Emperor Shao.
Document 2: British Empire: By the start of the 20th century, Germany and the United States challenged Britain's economic lead. Subsequent military and economic tensions between Britain and Germany were major causes of the First World War, during which Britain relied heavily upon its empire. The conflict placed enormous strain on the military, financial and manpower resources of Britain. Although the British Empire achieved its largest territorial extent immediately after World War I, Britain was no longer the world's pre-eminent industrial or military power. In the Second World War, Britain's colonies in South-East Asia were occupied by Imperial Japan. Despite the final victory of Britain and its allies, the damage to British prestige helped to accelerate the decline of the empire. India, Britain's most valuable and populous possession, achieved independence as part of a larger decolonisation movement in which Britain granted independence to most territories of the Empire. The transfer of Hong Kong to China in 1997 marked for many the end of the British Empire. Fourteen overseas territories remain under British sovereignty. After independence, many former British colonies joined the Commonwealth of Nations, a free association of independent states. The United Kingdom is now one of 16 Commonwealth nations, a grouping known informally as the Commonwealth realms, that share one monarch—Queen Elizabeth II.
Document 3: Sun Jian: Fearing Sun Jian, Dong Zhuo then sent his general Li Jue as an emissary to seek peace and propose a marriage to cement the alliance. However, Sun Jian rejected the proposals with harsh words and continued to lead his troops towards Luoyang. In late 190, his army was merely 90 "li" away from the capital when Dong Zhuo retreated west to Chang'an after ordering the destruction of Luoyang by fire. Entering the ruins of Luoyang, Sun Jian ordered his men to reseal the tombs of Han emperors that were excavated by Dong Zhuo, after which he returned to Luyang. It was said in the "Book of Wu" (吳書) by Wei Zhao that Sun Jian found one of the emperor's jade seals in a well south of Luoyang and kept it. Later, when Yuan Shu declared himself emperor, he held Sun Jian's wife Lady Wu hostage in exchange for the seal.
Document 4: Core countries: Core countries do not always stay core permanently. Throughout history, core nations have been changing and new ones have been added to the core list. The most influential countries in the past have been what would be considered core. These were the Asian, Indian and Middle Eastern empires in the ages up to the 16th century, prominently India and China were the richest regions in the world until the 15th century, when the European powers took the lead, although the major Asian powers such as China were still very influential in the region. Europe remained ahead of the pack until the 20th century, when the two World Wars turned disastrous for the European economies. It is then that the victorious United States and Soviet Union, up to late 1980s, became the two hegemons, creating a bipolar world order. The heart of civilisation consists of Western Europe, North America, Australasia and Japan. The population of the core is by far the wealthiest and best educated on the planet.
Document 5: Modern history: The major European powers laid claim to the areas of Africa where they could exhibit a sphere of influence over the area. These claims did not have to have any substantial land holdings or treaties to be legitimate. The European power that demonstrated its control over a territory accepted the mandate to rule that region as a national colony. The European nation that held the claim developed and benefited from their colony’s commercial interests without having to fear rival European competition. With the colonial claim came the underlying assumption that the European power that exerted control would use its mandate to offer protection and provide welfare for its colonial peoples, however, this principle remained more theory than practice. There were many documented instances of material and moral conditions deteriorating for native Africans in the late nineteenth and early twentieth centuries under European colonial rule, to the point where the colonial experience for them has been described as "hell on earth."
Document 6: Sima Liang: Sima Liang was the fourth son of Sima Yi, by his concubine, Lady Fu. During Cao Wei regencies of his older brothers Sima Shi and Sima Zhao, he served as a mid-level official. After his nephew Sima Yan took the throne as Emperor Wu of Jin, ending Cao Wei and starting Jin, Sima Liang was created the Prince of Fufeng and put in charge of the military commands of Qin (秦州, modern eastern Gansu) and Yong (雍州, modern central and northern Shaanxi) provinces. In 270, after his subordinate, the general Liu Qi (劉旂) was defeated by the Xianbei rebel Tufa Shujineng, Sima Liang tried to have Liu's life spared by claiming fault; Liu's life was spared, but Sima Liang lost his post as a result.
Document 7: Han dynasty: Emperor Zhang's (r. 75–88 AD) reign came to be viewed by later Eastern Han scholars as the high point of the dynastic house. Subsequent reigns were increasingly marked by eunuch intervention in court politics and their involvement in the violent power struggles of the imperial consort clans. With the aid of the eunuch Zheng Zhong (d. 107 AD), Emperor He (r. 88–105 AD) had Empress Dowager Dou (d. 97 AD) put under house arrest and her clan stripped of power. This was in revenge for Dou's purging of the clan of his natural mother—Consort Liang—and then concealing her identity from him. After Emperor He's death, his wife Empress Deng Sui (d. 121 AD) managed state affairs as the regent empress dowager during a turbulent financial crisis and widespread Qiang rebellion that lasted from 107 to 118 AD.
Document 8: Li Chongfu: In 701, Li Chongfu's brother Li Chongzhao (who had, by this point, changed his name to Li Chongrun to observe naming taboo of Wu Zetian's name), along with their sister Li Xianhui the Lady Yongtai and Li Xianhui's husband Wu Yanji (武延基) the Prince of Wei (Wu Zetian's grandnephew), were put to death for criticizing Wu Zetian's lovers Zhang Yizhi and Zhang Changzong. Whether Li Chongfu was responsible for leaking their criticism to the Zhangs and therefore leading to Li Chongrun's death is not known. Li Chongrun's mother Crown Princess Wei, after she later became empress again, would later accuse Li Chongfu of leaking the information, although there appears to be no particular evidence Li Chongfu did so, and in the "Zizhi Tongjian", it was asserted that her accusation against Li Chongfu was false.
Document 9: Modern history: After World War II, Europe was informally split into Western and Soviet spheres of influence. Western Europe later aligned as the North Atlantic Treaty Organization (NATO) and Eastern Europe as the Warsaw Pact. There was a shift in power from Western Europe and the British Empire to the two new superpowers, the United States and the Soviet Union. These two rivals would later face off in the Cold War. In Asia, the defeat of Japan led to its democratization. China's civil war continued through and after the war, resulting eventually in the establishment of the People's Republic of China. The former colonies of the European powers began their road to independence.
Document 10: Great power: All states have a geographic scope of interests, actions, or projected power. This is a crucial factor in distinguishing a great power from a regional power; by definition the scope of a regional power is restricted to its region. It has been suggested that a great power should be possessed of actual influence throughout the scope of the prevailing international system. Arnold J. Toynbee, for example, observes that "Great power may be defined as a political force exerting an effect co-extensive with the widest range of the society in which it operates. The Great powers of 1914 were 'world-powers' because Western society had recently become 'world-wide'."
Document 11: Sphere of influence: An example of spheres of influence was China in the late 19th and early 20th Century, when Britain, France, Germany, and Russia (later replaced by Japan) had de facto control over large swaths of territory. These were taken by unequal treaties or as very long term ``leases ''. These powers (and the United States) might have their own courts, post offices, commercial institutions, railroads, and gunboats in what was on paper Chinese territory. However, the foreign powers and their influence in some cases could have been exaggerated. The system ended with the Second World War.
Document 12: Han dynasty: When Empress Dowager Deng died, Emperor An (r. 106–125 AD) was convinced by the accusations of the eunuchs Li Run (李閏) and Jiang Jing (江京) that Deng and her family had planned to depose him. An dismissed Deng's clan members from office, exiled them and forced many to commit suicide. After An's death, his wife, Empress Dowager Yan (d. 126 AD) placed the child Marquess of Beixiang on the throne in an attempt to retain power within her family. However, palace eunuch Sun Cheng (d. 132 AD) masterminded a successful overthrow of her regime to enthrone Emperor Shun of Han (r. 125–144 AD). Yan was placed under house arrest, her relatives were either killed or exiled, and her eunuch allies were slaughtered. The regent Liang Ji (d. 159 AD), brother of Empress Liang Na (d. 150 AD), had the brother-in-law of Consort Deng Mengnü (later empress) (d. 165 AD) killed after Deng Mengnü resisted Liang Ji's attempts to control her. Afterward, Emperor Huan employed eunuchs to depose Liang Ji, who was then forced to commit suicide.
Document 13: Ji Ru: Ji Ru () was a trusted personal servant of Emperor Gaozu, the founder of China's Han Dynasty. Louis Crompton claims that Ji Ru was Gaozu's pillow companion, or homosexual lover, and that Ji Ru had more access to the emperor than did ministers. Ji Ru was documented by Sima Qian in the "Records of the Grand Historian":
Document 14: Liang Ji: Liang Ji (梁冀) (died 159), courtesy name Bozhuo (伯卓), was a politician and military commander of Han Dynasty China. As a powerful consort kin, he dominated government in the 150s together with his sister, Empress Liang Na. After his sister's death, Liang Ji was overthrown in a coup d'etat by Emperor Huan, with the support of the eunuch faction, in 159. The Liang clan and the clan of his wife, Sun Shou (孫壽), were slaughtered.
Document 15: British Empire: Between 1815 and 1914, a period referred to as Britain's ``imperial century ''by some historians, around 10,000,000 square miles (26,000,000 km) of territory and roughly 400 million people were added to the British Empire. Victory over Napoleon left Britain without any serious international rival, other than Russia in Central Asia. Unchallenged at sea, Britain adopted the role of global policeman, a state of affairs later known as the Pax Britannica, and a foreign policy of`` splendid isolation''. Alongside the formal control it exerted over its own colonies, Britain's dominant position in world trade meant that it effectively controlled the economies of many countries, such as China, Argentina and Siam, which has been described by some historians as an ``Informal Empire ''.
ground_truth: in the late 19th and early 20th Century
sub_queries: Which country was Liang Ji in? Answer: China
when was China divided into spheres of influence Answer: in the late 19th and early 20th Century