. After the
Proclamation of Indonesian Independence on 17 August 1945, Oerip and his family left KEM for Rohma's parents' home in Yogyakarta. When the People's Safety Body (, or BKR) was formed on 23 August, Oerip led a group of military commanders who petitioned for it to be set up as a national military formation; a separate group, led by politician
Oto Iskandar di Nata, wanted the BKR to fulfil the functions of a police organisation. The political leadership, consisting of
President Sukarno and
Vice President Mohammad Hatta, agreed to a compromise: it became a police-style organisation, but most of its members had served in the military, either with the
Defenders of the Homeland (PETA; ) or the
Heiho. On 14 October 1945 – nine days after the
Indonesian National Armed Forces was formally established – Oerip was declared its
Chief of General Staff and left immediately for Jakarta. In a cabinet meeting the following day, he was ordered to build a national army, headquartered in Yogyakarta, in preparation for an expected assault by Dutch troops coming to reclaim the Indies. He departed for Yogyakarta on 16 October, and arrived the following day. He first established the headquarters in a room at Hotel Merdeka, which he used until the Sultan of Yogyakarta
Hamengkubuwono IX donated land and a building for the army to use. With the BKR scattered under independent leadership throughout the country, the newly formed
People's Security Army ( or TKR, now known as the ) drew officers mainly from the native members of the former KNIL. However, these officers were poorly received by Indonesian nationalists, who viewed them as mercenaries for having served in the Dutch forces. Meanwhile,
rank and file members of the TKR were drawn from numerous groups, including former PETA, current Pemuda (young Indonesian revolutionaries), and the BKR. Although Oerip set out a command structure, in reality the army's hierarchy was provisional and depended heavily on the strength of local units. Following a government decree on 20 October Oerip became subordinate to both the acting Minister of Defence Soeljoadikoesoemo and Commander in Chief of the Armed Forces
Soeprijadi. However, neither man showed up to assume his duties. Soeprijadi, a PETA soldier who had led an uprising against Japanese forces in
Blitar in February 1945, was thought dead. While Soeljohadikosomo's position remained unfilled, the guerrilla leader
Moestopo declared himself Minister of Defence. As such, Oerip had little oversight and felt pressured to quickly establish a stable command structure. On 2 November, he appointed leaders for military operations in various parts of the country: Didi Kartasasmita for
western Java, Soeratman for
central Java, Mohammad for
eastern Java, and Soehardjo Hardjowardojo for
Sumatra; each of these sub-commanders was given the rank of major general. Oerip also began appropriating weapons to different TKR commands. He took confiscated Japanese weapons from well-equipped forces and distributed them as needed. However, the results were less successful than he had hoped. PETA had been organised locally during the Japanese occupation, and as such its members were unable to accept a centralised leadership.
Sudirman was elected as leader of the TKR on 12 November 1945. He kept Oerip as his chief of general staff. On 12 November 1945, at the first general meeting of army leadership,
Lieutenant General Sudirman – the leader of the Fifth Division in
Purwokerto, who had two years military experience and was 23 years younger than Oerip – was elected leader of the army following two deadlocked votes. In the third round, Oerip had 21 votes to Sudirman's 22. Divisional commanders from Sumatra, who had voted unanimously, swayed the vote in Sudirman's favour; Oerip had lost votes because some of the division leaders distrusted his history with the KNIL and the oath he had taken to the Dutch motherland upon graduation. Although Sudirman was surprised at his selection and offered to surrender the leadership position to Oerip, the meeting did not allow it; Oerip himself was glad to no longer be in charge of the army. Sudirman kept Oerip, by then a lieutenant general, to serve as chief of general staff under him. While Sudirman remained unconfirmed, Oerip remained
de jure leader; however, the Indonesian journalist Salim Said writes that Oerip's orders were at times unintelligible owing to the leader's poor command of Indonesian and often ignored unless approved by Sudirman. When
Lieutenant General Sudirman was approved on 18 December, he began working to consolidate and unite the army. Meanwhile, Oerip handled day-to-day organisational and technical issues. Many of the details, such as company uniforms, he left to regional commanders. However, to deal with more important issues, such as establishing a
military police and preventing enemy
paratroopers from landing, he passed edicts that applied nationally. Together, Sudirman and Oerip were able to address many of the differences between former KNIL and PETA troops. The government also renamed the army twice in January 1946, first to the People's Safety Army (), then to the Republic of Indonesia Military Forces(, or TRI). On 23 February 1946, Oerip was appointed head of the 11-member Committee to Reorganise the Army (), formed by presidential decree. After four months of discussion, on 17 May the committee gave its recommendations to Sukarno. Oerip was set to handle day-to-day operations of a downsized army, while the Ministry of Defence was given greater bureaucratic power. Sudirman was kept as commander of the young armed forces. As Minister of Defence
Amir Sjarifuddin began establishing pro-leftist groups within the military, Oerip became distrustful of the political leadership and vehemently decried the government's attempts to use soldiers' political affiliations to control the military. Still, he and Sudirman continued to work to ensure that
paramilitary troops (), which had arisen from the general populace, were included in the military. This was realised on 3 June 1947, when the government declared the union of the laskar and TRI into a new military organisation, the Indonesian National Armed Forces (, or TNI). Meanwhile, Oerip established a
military academy in Yogyakarta. To meet the Dutch threat, Oerip intended to attack while the former colonists were still consolidating their forces, a plan that was quashed by the government's attempts at diplomacy. He preferred guerrilla tactics to formal military conflicts, once telling a subordinate that the best attack would be one with a hundred snipers hidden behind enemy lines. Oerip was strongly against the
Renville Agreement, an ultimately unsuccessful treaty that led to the withdrawal of 35,000 troops from western Java and the formalisation of the
Van Mook Line between Dutch and Indonesian forces. He saw the agreement, ratified on 17 January 1948, as a stalling tactic, giving the Dutch the chance to strengthen their forces. Meanwhile, Amir Sjarifuddin – by then also serving as prime minister – began culling the army, predominantly keeping leftist-leaning troops. Disgusted with what he perceived as the government's lack of trust in the military, Oerip tendered his resignation, although he continued to serve as an advisor to the Minister of Defence, Vice President Hatta. After several months of growing steadily weaker and undergoing treatment from Dr Sim Ki Ay, on the evening of 17 November 1948 Oerip collapsed and died from a
heart attack in his room in Yogyakarta. After a night-long
viewing he was buried the next day in
Semaki Heroes' Cemetery and posthumously promoted to general. When Sudirman threatened to resign in 1949, he blamed Oerip's death – as well as his own
tuberculosis – on the government's inconsistency during the revolution. Oerip was survived by his wife and adopted daughter. Abby died of malaria in January 1951, and Rohmah died on 29 October 1977 in Semarang; she was buried in
Ungaran. == Legacy ==