Wars involving Ukraine

The Russo-Ukrainian war began in February 2014 and is ongoing. Following Ukraine's Revolution of Dignity, Russia occupied Crimea and annexed it from Ukraine. It then supported Russian separatist armed groups who started a war in the eastern Donbas region against Ukraine's military. In 2018, Ukraine declared the region to be occupied by Russia. The first eight years of conflict also involved naval incidents and cyberwarfare. In February 2022, Russia launched a full-scale invasion of Ukraine and began occupying more of the country, starting the current phase of the war, the biggest conflict in Europe since World War II. The war has resulted in a refugee crisis and hundreds of thousands of deaths.

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 US forces were officially withdrawn in 2011.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.

multi-sided civil war in the former Russian Empire, November 1917-October 1922

armed conflict between NATO countries and Afghanistan from 2001 to 2021

conflict between Poland and Soviet Russia following the First World War (February 1919 - March 1921)

Since April 2023, there has been a civil war in Sudan between two primary factions of the country's military government. The conflict involves the internationally recognized government, controlled by the Sudanese Armed Forces (SAF) under General Abdel Fattah al-Burhan, against the paramilitary Rapid Support Forces (RSF), led by General Hemedti, who commands the broader Janjaweed coalition. Smaller armed groups have taken part. Fighting began on 15 April 2023 following a power struggle within the transitional administration established after the 2021 coup. As of 5 February 2025, the conflict has forcibly displaced 12 million people, with 3.5 million fleeing the country as refugees, making it one of the largest displacement crises in recent history.

series of wars in the 17th–19th century

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

1939 military conflict

Islamist insurgency in the Democratic Republic of the Congo and Uganda

Wikipedia list article

overview of Ukrainian involvement in World War I

military unit

Ukrainian military participation in the Iraq War