In recent years, Argentina has had a strong partnership with the United States in support of UN peacekeeping. Argentina was the only Latin American country to participate in the Gulf war and all phases of the Haiti operation. It has contributed Argentine soldiers and policy to UN peacekeeping operations worldwide. In recognition of its contributions to international security and peacekeeping, the U.S. Government designated Argentina as a major non-NATO ally in January 1998. Argentina has been an enthusiastic supporter of the Summit of the Americas process and has served as chair of the Free Trade Area of the Americas initiative. At the UN, Argentina's positions have often coincided with those of the United States. Argentina supported efforts to improve human rights in Cuba and the fight against international terrorism and narcotics trafficking. However, Argentina was reluctant to contribute troops to the Coalition forces in Iraq in 2003, and raised diplomatic relations with Cuba back to Ambassadorial status in 2003.

Eager for closer ties to industrialized nations, Argentina left the Non-Aligned Movement in the early 1990s and has pursued a relationship with the OECD. It has become a leading advocate of nonproliferation efforts worldwide. A strong proponent of enhanced regional stability in South America, Argentina has revitalized its relationship with Brazil; settled lingering border disputes with Chile; discouraged military takeovers in Ecuador and Paraguay; served with the U.S., Brazil, and Chile as one of the four guarantors of the Ecuador-Peru peace process; and restored diplomatic relations with the United Kingdom. In 1998, President Menem made a state visit to the U.K., and Prince Charles reciprocated with a visit to Argentina. In 1999, the two countries agreed to normalize travel to the Falklands/Malvinas from the mainland and resumed direct flights.