It is difficult to assess Marenches's achievements. Some believed that while he was one of the busiest figures on the intelligence circuit, some of his pronouncements (such as those on the
Soviet Union) were based on slander. Others noted how he successfully cultivated his contacts in the
Middle East, pushed the sales of
Dassault Mirage fighters, and helped to establish a relationship with
Iraq that persisted. In Africa, sometimes working with the old Gaullist emissary
Jacques Foccart and sometimes behaving as his rival, Marenches strengthened France's traditional strongholds. He co-founded the
Safari Club, a "private intelligence group [which was] one of
George H. W. Bush's many end runs around congressional oversight of the
American intelligence establishment and the locus of many of the worst features of the mammoth
BCCI scandal." The Safari Club involved a number of states, including
Saudi Arabia (which financed the operations),
Morocco,
Egypt and
Iran, and was intended to counter
Soviet operations in the
Middle East and
Africa. An interlocutor with many heads of state in the world and a close friend of King
Hassan II of Morocco, he was elected member of the
Academy of Morocco. After the election of
Ronald Reagan to the presidency of the
United States, he would have become, according to the American journalist Colley, one of his closest advisers doing business in
Afghanistan. Im
Dans le secret des princes, he states he was asked by an American journalist, who was a distant relative, where he could go in the world to write an article on an important geopolitical situation that was almost unknown. Marenches proposes several places. The journalist answers that he wanted one place. Marenches chooses randomly Afghanistan, because of the threat of a
Soviet invasion. The journalist asked US
National Security Advisor Zbigniew Brzezinski if Afghanistan could be an interesting place to write. Brzezinski said that it was not an interesting place. The journalist left for
Kabul, "arriving in the same time as the Soviet tanks did", just a coincidence. Marenches also conceived
Operation Mosquito. In a meeting with Reagan at the White House, he suggested for the
Drug Enforcement Administration to take all the drugs confiscated and supply them covertly to the Soviet Army in Afghanistan. In a few months, he explained, it would be demoralized, and its fighting ability would be gone. Marenches added, according to his published memoirs, that a few trusted people could do all that at a cost of approximately a million dollars. Marenches also told Reagan that the United States controlled only four of the eight strategic raw materials and that the Soviets controlled all of them.
Édouard Balladur knew Marenches well from when they were both working closely with Pompidou. When Balladur was prime minister, he was due to preside over a medal-awarding ceremony. He was suddenly unable to attend and so asked Marenches to take his place. That was a serious mark of Balladur's respect and friendship. At 6'4" and heavily built, he was called
Porthos in reference to the character in
The Three Musketeers. Charismatic and colourful, he was popular for his valour and patriotism. == Resignation ==