As with any country, Hungarian security attitudes are shaped largely by history and geography. For Hungary, this is a history of more than 400 years of domination by great powers—the Ottomans, the Habsburg dynasty, the Germans during World War II, and the Soviets during the Cold War—and a geography of regional instability and separation from Hungarian minorities living in neighboring countries. Hungary's foreign policy priorities, largely consistent since 1990, represent a direct response to these factors. Since 1990, Hungary's top foreign policy goal has been achieving integration into Western economic and security organizations. Hungary joined the Partnership for Peace program in 1994 and has actively supported the IFOR and SFOR missions in Bosnia. The Horn government achieved Hungary's most important foreign policy successes of the post-communist era by securing invitations to join both NATO and the European Union in 1997. Hungary became a member of NATO in 1999, and a member of the EU in 2004.
Hungary also has improved its often frosty neighborly relations by signing basic treaties with Romania, Slovakia, and Ukraine. These renounce all outstanding territorial claims and lay the foundation for constructive relations. However, the issue of ethnic Hungarian minority rights in Slovakia and Romania periodically causes bilateral tensions to flare up. Hungary was a signatory to the Helsinki Final Act in 1975, has signed all of the CSCE/OSCE follow-on documents since 1989, and served as the OSCE's Chairman-in-Office in 1997. Hungary's record of implementing CSCE Helsinki Final Act provisions, including those on reunification of divided families, remains among the best in eastern Europe. Hungary has been a member of the United Nations since December 1955.
- The Gabčíkovo - Nagymaros Dams project
This involves Hungary and Czechoslovakia, and .was agreed on September 16, 1977 ("Budapest Treaty"). The treaty envisioned a cross-border barrage system between the towns Gabčíkovo, Czechoslovakia and Nagymaros, Hungary. After intensive campaign the project became widely hated as a symbol of the old communist regime. In 1989 Hungarian government decided to suspend it. In its sentence from September 1997, the International Court of Justice stated that both sides breached their obligation and that the 1977 Budapest Treaty is still valid. In 1998 the Slovak government turned to the International Court, demanding the Nagymaros part to be built. The international dispute is still not solved as of 2008.
On March 19, 2008 Hungary recognized Kosovo as an independent country.
Disputes – international:
Ongoing Gabčíkovo - Nagymaros Dams dispute with Slovakia
Major trans-shipment point for Southwest Asian heroin and cannabis and transit point for South American cocaine destined for Western Europe; limited producer of precursor chemicals, particularly for amphetamines and methamphetamines
The hungarian border barrier was built in 2015, and Hungary was criticized by other European countries for using tear gas and water cannons on refugees of the Syrian Civil War as they were – illegally – trying to pass the country.
Since 2017, the Hungary–Ukraine relations rapidly deteriorated over the issue of the Hungarian minority in Ukraine.