1900–2000
- Acehnese War (1873–1904)
- Philippine-American War (1899–1902)
- South African War (1899–1902)
- The War of a Thousand Days (1899–1903)
- Boxer Rebellion (1900–01)
- Moro Wars (1901–13)
- Russo-Japanese War (1904–05)
- Pig War (1906–09)
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Secondly, what war did the US fight in the 1900's?
World War I
By no means, what war was in 1902? South African War
Furthermore there, what war was fought in 1911?
Italo-Turkish War
What war was the longest in history?
Iberian Religious War
17 Related Questions Answered
Vietnam was an unmitigated disaster, the only war the US has ever lost. It took the lives of 58,000 Americans and an estimated 2.5 million Vietnamese. It cost untold treasure, destroyed a president, and fired the protest of a generation at home and around the world as no event since.
1900–1919
StartFinishName of Conflict
| 1904 | 1907 | Portuguese campaign against the Ovambo (See Battle of Mufilo) |
| 1904 | 1904 | Vaccine Revolt |
| 1904 | 1904 | Revolution of 1904 |
May 20 – Cuba gains independence from the United States. May 22 – Crater Lake National Park is established in Oregon. June 2 – The Anthracite Coal Strike begins in the United States. June 15 – The New York Central railroad inaugurates the 20th Century Limited passenger train between Chicago and New York City, New York.
World War II
The Spanish-American War.
The war pitted the Central Powers—mainly Germany, Austria-Hungary, and Turkey—against the Allies—mainly France, Great Britain, Russia, Italy, Japan, and, from 1917, the United States. It ended with the defeat of the Central Powers.
The Ottoman military there numbered about 5,000 infantrymen and 350 cavalry. The war broke out because Italy claimed that, as the heir of the Roman Empire, she was entitled to rule over former Roman territories.
Three days later, Germany and Italy, allied with Japan, declared war on the United States. America was now drawn into a global war. It had allies in this fight--most importantly Great Britain and the Soviet Union. But the job the nation faced in December 1941 was formidable.
Lengths of U.S. combat forces' participation in wars
WarDates
| 1. | Afghan War | 2001 – 2014, 2015 – present |
| 2. | Vietnam War | 1955/11 – 1973/04 |
| 3. | Moro Rebellion | 1899 – 1913 |
| 4. | War in North-West Pakistan | 2004 – 2017 |
June 2020 – present: American–Iraqi security dialogue The United States and Iraq scheduled new negotiations regarding military, political, and economic cooperation for June. ... On 23 August 2020, U.S. troops withdrew from Taji Base and handed it over to Iraqi security forces.
Afghanistan
Wars and armed conflicts with highest estimated death tolls of 100,000 or more
EventLowest estimateGeometric mean estimate
| World War II | 60,000,000 | 84,269,920 |
| Three Kingdoms | 36,000,000 | 37,947,332 |
| Mongol conquests | 30,000,000 | 34,641,016 |
| European colonization of the Americas | 8,400,000 | 34,047,026 |
World War II
The Civil War
Pakistan
American loss of Vietnam
The United States has been physically invaded a few times, once during the War of 1812, once during the Mexican–American War, several times during the Border War, and once during World War II.