War is an armed conflict [a] between the armed forces of states, or between governmental forces and armed groups that are organized under a certain command structure and have the capacity to …

20 hours ago · Iran says it has accepted a two-week ceasefire in the war, and will negotiate with the United States in Islamabad beginning Friday. President Donald Trump said Tuesday he’s pulling …

Mar 21, 2026 · War, in the popular sense, a conflict between political groups involving hostilities of considerable duration and magnitude. Sociologists usually apply the term to such conflicts only if …

13 hours ago · President Donald Trump agreed to suspend strikes that he threatened against critical Iranian infrastructure for two weeks.

1 day ago · US President Donald Trump issued new threats and mused about negotiations at a White House press conference Monday as the war with Iran continues. Earlier, Tehran rejected a …

2 days ago · Iran war: What is happening on day 38 of US-Israeli attacks? Tensions continue after Trump’s threat on Truth Social for Iran to reopen the Strait of Hormuz.

3 days ago · LIVE Iran Israel War Highlights: Northern Israel Targeted in Fresh Hezbollah Rocket Barrage; Air Defenses Active Across UAE Amid Iranian Attack Iran Israel War Highlights: The month …

5 days ago · The Department of War provides the military forces needed to deter war and ensure our nation's security.

Follow Iran war news as the Trump administration weighs next steps. The U.S. first launched strikes against the country on Feb. 28.

How common are armed conflict and peace between and within countries? How is this changing over time? Explore research and data on war and peace.