Wars involving Romania

World War II, or the Second World War, was a global conflict between two coalitions: the Allies and the Axis powers. Nearly all of the world's countries participated. Tanks and aircraft played major roles, the latter enabling the strategic bombing of cities and delivery of the only nuclear weapons used in war. World War II was the deadliest conflict in history, causing the death of 60 to 75 million people. Millions died as a result of massacres, starvation, disease, and genocides, including the Holocaust. After the Allied victory, Germany, Austria, Japan, and Korea were occupied, and German and Japanese leaders were tried for war crimes.

World War I, or the First World War, also known as the Great War, was a global conflict between two coalitions: the Allies and the Central Powers. Major areas of conflict included Europe and the Middle East, as well as parts of Africa and the Asia-Pacific. The war saw important developments in weaponry including tanks, aircraft, artillery, machine guns, and chemical weapons. One of the deadliest conflicts in history, it resulted in an estimated 15 to 22 million military and civilian casualties and genocide. The movement of large numbers of people was a major factor in the deadly Spanish flu pandemic.

The Gulf War was an armed conflict between Iraq and a 42-country coalition led by the United States. The coalition's efforts were in two phases: Operation Desert Shield, which marked the military buildup from August 1990 to January 1991; and Operation Desert Storm, from the bombing campaign against Iraq on 17 January until the American-led liberation of Kuwait on 28 February.

The Iraq War, also referred to as the Second Gulf War, was a protracted armed conflict in Iraq from 2003 to 2011. It began with the invasion by a United States–led coalition, which resulted in the overthrow of the Ba'athist government of Saddam Hussein. During the US occupation of Iraq, the conflict persisted as an insurgency that arose against coalition forces and the newly established Iraqi government. US forces were officially withdrawn in 2011. In 2014, the US became re-engaged in Iraq, leading a new coalition under Combined Joint Task Force – Operation Inherent Resolve, as the conflict evolved into the ongoing Islamic State insurgency.

armed conflict between NATO countries and Afghanistan from 2001 to 2021

1877–1878 conflict between the Ottoman and Russian Empires

continuation of the First Balkan War in which Bulgaria fought Serbia, Greece, Romania and the Ottoman Empire

1990–1992 conflict between Moldova and Russian-backed self-proclaimed Transnistria

1918–1919 conflict between the Second Polish Republic and West Ukrainian People's Republic

Independence War of Romania as part of the Russo-Turkish War (1877–1878)

war (15 April – 3 August 1919) fought between the First Hungarian Republic and the Hungarian Soviet Republic and the Kingdom of Romania

1944–1962 armed resistance movement against communist rule in Romania

period of revolutions and interventions in Hungary between 1918 and 1920