In the aftermath of the March Accord, Iranian and Israeli officials tried to persuade the Nixon administration that the agreement was part of a Soviet plot to free up Iraq's military for aggression against Iran and Israel, but U.S. officials refuted these claims by noting that Iraq had resumed purging ICP members on March 23, 1970, and that Saddam was met with a "chilly" reception during his visit to Moscow on August 4–12, during which he requested deferment on Iraq's considerable foreign debt.[93] Iraqi–Soviet relations improved rapidly in late 1971 in response to the Soviet Union's deteriorating alliance with Egyptian leader Anwar al-Sadat, who succeeded Nasser following the latter's death on September 28, 1970.[94] However, even after Iraq signed a secret arms deal with the Soviets in September 1971, which was finalized during Soviet Defense Minister Andrei Grechko's December trip to Baghdad and "brought the total of Soviet military aid to Iraq to above the $750 million level," the State Department remained skeptical that Iraq posed any threat to Iran.[95][96] On April 9, 1972, Soviet Prime Minister Alexei Kosygin signed "a 15-year treaty of friendship and cooperation" with al-Bakr, but U.S. officials were not "outwardly perturbed" by this development, because, according to the NSC staff, it was not "surprising or sudden but rather a culmination of existing relationships."[97][98]