The Civil War was the deadliest conflict in American history

Two-thirds of soldier deaths during the war were due to disease

Roughly two-thirds of all Civil War deaths resulted from disease rather than battle. Poor sanitation, contaminated water, and limited medical knowledge made camps breeding grounds for dysentery, typhoid, and other deadly infections.

The Civil War lasted for 4 years, with fighting taking place in a majority of the country

Fought from 1861 to 1865, the Civil War saw battles and raids across much of the country—from Pennsylvania to Texas and New Mexico to Florida.

The Civil War introduced many technological advances to both society and warfare

The conflict accelerated innovations—including railroads, telegraphs, ironclad ships, and mass-produced weapons—while advances in photography, medicine, and manufacturing transformed how Americans communicated, healed, and built after the war.

More than 58,000 American soldiers died in the Vietnam War

Fought to contain communism in Southeast Asia, the Vietnam War became one of the most costly and controversial Cold War conflicts. The US ultimately withdrew in 1973, and South Vietnam fell to communist forces two years later.

37 maps that explain the American Civil War

This collection of 37 maps tells the story of the American Civil War as well as any historical account. See how and where the war began and why, and where the major battles were fought. Discover how the North achieved victory and the many ways the war changed America forever.

A graphic illustration of death tolls in historical events and wars

Which killed more, the American Civil War or the Korean War? Hurricane Katrina or the Titanic sinking? You’ll be surprised how wrong you are about death tolls.

Approximately 180,000 African Americans served in Union forces

About 180,000 Black soldiers—roughly 10% of the Union army—served in the United States Colored Troops after 1863. Despite lower pay and discrimination, they were crucial to the Union victory.

Congress descended into fistfights, duels, and violence before the Civil War

In the decades before the Civil War, members of the United States Congress carried weapons, assaulted colleagues, and, in one case, a congressman killed another in a duel. The violence was driven largely by sectional conflict over slavery and foreshadowed the nation's descent into war.

America's top causes of death are heart disease, cancer, accidents, and stroke

Heart disease killed more than 680,000 people in 2023 and cancer killed around 613,000 people that year. Both causes of death are far above the next leading cause of death—accidents, which numbered around 223,000. Provisional data for 2024 indicates the leading causes of death remained the same.

Congress has formally declared war 11 times across five conflicts, the last in 1942

The five declared wars were the War of 1812, the Mexican-American War, the Spanish-American War, World War I, and World War II. Every major American military conflict since Korea, Vietnam, Iraq, and Afghanistan has been fought without a formal declaration.

The American War of Independence included over 1,500 military engagements

Several hundred of these were major battles like Yorktown, Saratoga, and Bunker’s Hill. This interactive map shows the locations of key locations of the conflict, highlighting major factors in each battle and their outcome.

How much did WWII cost?

Though it lasted fewer than four years, World War II was the most expensive war in United States history, according to this infographic. Read through it to see how much WWII cost and learn about the consequences of financing such an expensive conflict.

How Emily Dickinson and Walt Whitman grappled with the American Civil War

Whitman, whose brother was injured while fighting for the Union, was often overt in his pro-Union poems. Dickinson, whose brother paid to have someone enlist under his name, was more subtle, though equally as affected, as this comparative analysis makes clear.

Explore an interactive map of battles from the American Revolution, along with detailed summaries of each engagement

US troops committed widespread atrocities during the Mexican-American War

American volunteer regiments frequently looted towns, raped civilians, and executed prisoners—especially in occupied northern Mexico. Historians have documented how racial hatred and impunity fueled war crimes that were rarely punished by military leadership.

Key moments that shaped the national debt include the Civil War, both World Wars, the 2008 recession, and the COVID-19 pandemic

The US national debt has grown alongside wars, recessions, and policy shifts—from $75M after the Revolutionary War to over $34T today. This visual timeline walks through key moments that shaped the debt.

View the ten deadliest tornadoes in US history.

The highest inflation in US history was estimated at 30% in 1778

This was just after the Revolutionary War. Both World Wars also brought double-digit inflation. It's worth noting that exact inflation rates in early America are difficult to calculate precisely.

The trans-Atlantic slave trade brought over 10 million enslaved people to the Americas

During the Atlantic slave trade (1526-1867), about 12.5 million Africans were forced onto ships; only 10.7 million survived to reach the Americas. Fewer than 400,000 arrived in what became the United States—the rest were taken to the Caribbean or Latin America.

Long after his death, Washington was made the highest-ranking military figure in US history

Only three Americans have held the rank of General of the Armies: John J. Pershing, Ulysses S. Grant, and Washington. However, Washington still outranks the others because Congress passed a 1976 law stating that he outranks all officers "past or present."

View the ten deadliest tornadoes in US history.

Why the 1918 flu killed between 50 and 100 million people

The 1918–1920 flu pandemic (once called, incorrectly, the Spanish flu) killed quickly and in huge numbers, with estimates of the global death toll ranging from 50 to 100 million people. Several factors contributed to the high mortality rate: lack of antibiotics, the global disruption of World War I, and more.

Abraham Lincoln's assassination helped create the multibillion-dollar funeral business

After the president was killed in April 1865, he became one of the first well-publicized embalming examples in the US. The burgeoning science enabled his body to go on a multistate tour. Prices soon climbed for the process and fueled more wakes, perhaps helping to lay the foundation for the pricy funeral industry.

World War II's Battle of Savo Island was the worst wartime naval defeat in US history

On Aug. 9, 1942, a larger, radar-equipped Allied fleet lost four heavy cruisers off Guadalcanal in the Pacific theater without sinking a single Japanese ship. The Navy kept the humiliating rout secret from the public for years. Experts argued failure resulted from fractured command, not inferior arms or ships.

11 people died from firework injuries in the US in 2024.

The deadliest fireworks accident in history was Marie-Antoinette's wedding

In 1770, a fireworks display in Paris celebrating the marriage of Marie-Antoinette to the Dauphin, later known as Louis XVI, resulted in as many as 3,000 deaths. Most casualties were caused by trampling from a panicked crowd of thousands rushing away after some fireworks were blown into the spectators.

The Russia-Ukraine conflict is the largest ground war in Europe since World War II in terms of casualties, forces mobilized, and displacement of civilians.

What happened on WWI's Italian Front?

The battle in the Dolomites, or the White War, might have been the roughest, most arduous, and deadliest conflict during World War I. Italian and Austrian troops fought for control of the Dolomites mountain range over the course of three years, leading to the deaths of 700,000 Italian soldiers and 350,000 Austro-Hungarian troops. A grim account of a dirty little war high in the Dolomites.

Nearly all American skilled workers deserted the canal worksite the first year

More than 75,000 workers labored to build the Panama Canal, and up to a third of them, by some estimates, died on the job. This gallery of 16 archival black-and-white photographs from PBS shows what life was like for the workers.

Abraham Lincoln was almost assassinated weeks before his inauguration as he traveled from Illinois to DC through Baltimore in 1861; it took two independent claims for Lincoln to be convinced the threat was real

See how Ebola tore through Guinea, Sierra Leone, and Liberia in 2014-2016.

Roughly 43 million US borrowers owe roughly $1.7T in student debt, the second-largest source of consumer debt behind mortgages.

Discover the catastrophic consequences of a failure of the US electrical grid—something that is more likely than many Americans think.

The United States has had a tumultuous relationship with Cuba since its 1959 revolution, highlighted by a nuclear crisis and a decades-long trade embargo.

The US Constitution is widely regarded as the longest-standing written national constitution still in force—see how it has influenced rights worldwide.

Hear about the 250-year history of the United States Postal Service, complete with some of its strangest deliveries, important innovations, and the figures that made it an American institution.

The American Society of Civil Engineers' infrastructure report card gave the US a C in 2025, its highest grade since the project launched in 1998.

Louisiana's 'Cancer Alley' is infamous for having some of the highest industrial pollution, toxic air emissions, and cancer risks in the US.

Many legends about George Washington, including his supposed wooden teeth and the story of cutting down the cherry tree, lack evidence.

See the most iconic photos from four decades of LIFE magazine

The US first hosted the World Cup in 1994, a tournament that lives in soccer infamy for its poor planning and the murder of Colombian player Andres Escobar, who'd accidentally scored on his own net.

At the beginning of the 20th century, a group of young men ate standard American food—replete with food additives like borax and formaldehyde—as part of government research to better understand food safety.

Between 10 million and 50 million people in the US develop rashes from poison ivy, poison sumac, and poison oak each year.

In 2019, a laptop loaded with six of the worst malware in history and described as 'an exhibit of historical weaponry' sold for $1.3M.

The concept of phantom limbs, the perception that amputated limbs are still present, dates back to a French military surgeon in the 16th century.

Before the current East Wing ballroom project, only two White House renovations in the past 100 years cost more than $10M.

Larger animals like giraffes, elephants, and blue whales have developed a unique defense against cancer, a phenomenon known as Peto's Paradox

44% of Americans say they pray at least once a day—discover how your state's religiosity stacks up against the rest of the country.

In its famous catalog, Sears sold $600 DIY house kits from 1908 through the 1940s, resulting in an estimated 100,000 'Sears and Roebuck homes.'

The Beatles' US label rejected the band's first two singles, 'Please Please Me' and 'From Me to You,' with one executive calling the band 'dead in the water.'