Operation Just Cause

The Torrijos-Carter Treaties, which set in motion the process of handing the Panama Canal over to Panamanian control, was signed by President of the United States Jimmy Carter and Omar Torrijos of Panama on September 7, 1977. U.S. relations with General Noriega spanned decades from 1959 to the early 1980s, when Noriega served as a U.S. intelligence asset and was on the Central Intelligence Agency's payroll. Noriega's relations with George H. W. Bush may have begun in the 1970s, when Bush was head of the CIA. Noriega had worked to advance U.S. interests in Central America, notably in sabotaging the forces of the socialist government in Nicaragua, the Sandinistas, and the FMLN revolutionaries in El Salvador, receiving a salary upwards of $100,000 per year for his efforts. Although he worked with the Drug Enforcement Administration to restrict illegal drug shipments, he was known to work with the drug dealers themselves simultaneously.

During the 1980s, U.S. President Ronald Reagan negotiated with General Noriega, requesting that the Panamanian leader peacefully step down, while pressuring him with several drug-related indictments in U.S. courts. Later negotiations involved dropping the drug-trafficking indictments. In March 1989, an attempted coup against the government of Panama was resisted by Noriega's forces. In May '89, during the national elections, an alliance of parties opposed to the military dictatorship of Manuel Noriega counted results from the country's election precincts before they were sent to the district centers. Their tally showed their candidate, Guillermo Endara defeating Carlos Duque, candidate of a pro-Noriega coalition, by a nearly 3-to-1 margin. Endara was beaten up by Noriega supporters the next day. Noriega declared the election null and maintained power by force, making him unpopular among Panamanians. Noriega's government insisted that they won the presidential election and irregularities had been on the part of U.S.-backed candidates from opposition parties. Bush called on Noriega to honor the will of the Panamanian people.

A US Marine Corps LAV-25 in Panama

In October 1989, Noriega foiled a second coup attempt led by major Moisés Giroldi. Pressure mounted on Bush, as the media labeled him a "wimp" for failing to aid Panama amidst his rhetoric. Bush declared that the U.S. would not negotiate with a known drug-trafficker and denied having any knowledge of Noriega's involvement with the drug trade prior to his indictment. President Bush's allegations that forces under Noriega's command had shot and killed an unarmed American serviceman, wounded another, arrested and brutally beat a third American serviceman and then brutally interrogated his wife, threatening her with sexual abuse, were cited by US Ambassador Thomas R. Pickering to the United Nations Security Council as sufficient grounds for invasion as an act of self-defense within Article 51 of the UN charter.

Three incidents in particular occurred very near the time of the invasion, and were mentioned by US President George H.W. Bush as a reason for invasion. In a December 16 incident, four U.S. personnel were stopped at a roadblock outside PDF headquarters in the El Chorrillo neighborhood of Panama City. The United States Department of Defense claimed that the servicemen were unarmed and in a private vehicle and that they attempted to flee the scene only after their vehicle was surrounded by a crowd of civilians and PDF troops. The PDF claimed the Americans were armed and on a reconnaissance mission.

U.S. Marine, 2nd Lt. Robert Paz, returned from a restaurant in Panama City. Paz was recovering from recent knee reconstruction surgery, and on leave from his duty station of Camp Pendleton California; he was stopped and harassed to the point where he panicked; as he attempted to flee, he was shot and killed. It was also reported by the Los Angeles Times that "according to American military and civilian sources" the officer killed was a member of the "Hard Chargers", a group whose goal was to agitate members of the PDF. It was also reported that the group's "tactics were well known by ranking U.S. officers" who were frustrated by "Panamanian provocations committed under dictator Manuel A. Noriega", although the group was not officially sanctioned by the military. The Pentagon later denied that such a group ever existed. According to an official U.S. military report "witnesses to the incident, a U.S. naval officer and his wife were assaulted by Panamanian Defense Force soldiers while in police custody".