Under the Presidencies of Arif, and, especially, his brother Abdul Rahman Arif, the U.S. and Iraq developed closer ties than at any point since the 1958 revolution.[59][60] The Lyndon B. Johnson administration favorably perceived Arif's proposal to partially reverse Qasim's nationalization of the IPC's concessionary holding in July 1965 (although the resignation of six cabinet members and widespread disapproval among the Iraqi public forced him to abandon this plan), as well as pro-Western lawyer Abdul Rahman al-Bazzaz's tenure as Prime Minister; Bazzaz attempted to implement a peace agreement with the Kurdish rebels following a decisive Kurdish victory at the Battle of Mount Handren in May 1966.[61] Rahman Arif (hereinafter referred to as "Arif") was considered "one of the few forces of moderation" in Iraq, having established a friendship with ambassador Strong prior to assuming the presidency and making a number of friendly gestures to the U.S. between April 1966 and January 1967.[62][63] At Arif's request, President Johnson met five Iraqi generals and Iraqi ambassador Nasir Hani in the White House on January 25, 1967, reiterating his "desire to build an ever closer relationship between [the] two governments."[64] According to Johnson's National Security Adviser, Walt Whitman Rostow, the NSC even contemplated welcoming Arif on a state visit to the U.S., although this proposal was ultimately rejected due to concerns about the stability of his government.[65][66] Prior to the outbreak of the Six-Day War, Iraqi Foreign Minister Adnan Pachachi met with a number of U.S. officials to discuss the escalating Middle East crisis on June 1, including U.S. ambassador to the UN Arthur Goldberg, Under Secretary of State for Political Affairs Eugene V. Rostow, Secretary of State Dean Rusk, and President Johnson himself.[67] The political atmosphere engendered by the costly Arab defeat prompted Iraq to break relations with the U.S. on June 7, and ultimately ensured the collapse of Arif's relatively moderate government.[68] Like his brother, Arif previously tried to balance radical and moderate elements in Iraq, but this balancing act was upended by the war as Arif moved to placate the ascendant Iraqi nationalists, notably by reappointing Tahir Yahya to the position of prime minister.[69] Yahya had announced his intention to create a national oil company during his first premiership in late 1963, laying the groundwork for the Iraq National Oil Company (INOC). During his second term as prime minister from July 1967 to July 1968, Yahya moved to revitalize the INOC and sought to work with France and the Soviet Union to develop the technical capacity to nationalize the IPC outright, pledging to use Iraq's "oil as a weapon in the battle against Israel."[70]