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The first phase (431–421 BC) was named the Ten Years War, or the Archidamian War, after the Spartan king Archidamus II, who invaded Attica several times with the full Hoplite army of the Peloponnesian League, the alliance network dominated by Sparta (then known as Lacedaemon)
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Historians have traditionally divided the war into three phases
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Several battles took place during the Peace of Nicias. The Sicilian Expedition was an Athenian military campaign in Sicily from 415–413 BCE. The ambitious invasion, intended to conquer the city of Syracuse and cut off Spartan grain supplies, resulted in the almost destruction of the Athenian expedition and marked a major turning point in the war
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The Sicilian disaster prompted the third phase of the war (413–404 BC), named the Decelean War, or the Ionian War
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Often called the "Golden Age of India," this period saw massive advancements in science, mathematics (including the concept of zero), and art.
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The Qin Dynasty unified China for the first time, establishing the imperial system and beginning construction on the Great Wall of China.
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The ruler of the Mali Empire traveled to Mecca, distributing so much gold that he reportedly caused a decade of inflation in Egypt.
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A plague pandemic that killed around 75-200 million people
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Johannes Gutenberg’s movable type press revolutionized the spread of information, fueling the Renaissance and Reformation.
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The 13 colonies declared their separation from Great Britain, a moment influenced by European Enlightenment ideals.
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Negotiated by Benjamin Franklin, this was the first U.S. military alliance, providing critical support for the Revolutionary War.
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Great Britain formally recognized American independence, officially ending the Revolutionary War.
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Eli Whitney’s invention revolutionized the cotton industry by automating the separation of seeds from fiber.
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The U.S. purchased a massive territory from Napoleonic France, nearly doubling its size and signaling its westward ambitions.
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Often called the "Second War of Independence," it was a byproduct of the global Napoleonic Wars between Britain and France
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President James Monroe declared that the Western Hemisphere was closed to further European colonization
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Samuel Morse developed the telegraph and Morse code, enabling near-instantaneous long-distance communication
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John Collins Warren performed the first successful surgery using ether at Massachusetts General Hospital.
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Ended the Mexican-American War and annexed territories including California and the Southwest.
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Commodore Matthew Perry's mission ended Japan's self-imposed isolation, opening its ports to American trade.
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Known as "Seward's Folly," this treaty with Russia added 586,000 square miles to the U.S. for $7.2 million.
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Japan ended its isolationist policy and the Tokugawa shogunate, rapidly modernizing into a global power.
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This artificial waterway connected the Mediterranean to the Red Sea, drastically shortening trade routes between Europe and Asia.
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Thomas Edison perfected a commercially viable electric lighting system, fundamentally changing urban life and work hours.
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European powers met to divide Africa into colonies, an event known as the "Scramble for Africa".
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Following a swift victory over Spain, the U.S. gained Puerto Rico, Guam, and the Philippines, emerging as a trans-oceanic power.
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A diplomatic note issued by Secretary of State John Hay calling for equal trading rights for all nations in China.
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Orville and Wilbur Wright achieved the first controlled, sustained flight of a powered aircraft in Kitty Hawk, North Carolina
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A German U-boat sinks a British liner, killing 128 Americans
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Italy switches sides
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A massive, months-long battle between French and German armies
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Major naval battle between British and German fleets
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Over 1 million casualties occur in this Allied offensive
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A blueprint for world peace used as the basis for the armistice ending World War I.
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Germany launches the "Spring Offensive" on the Western Front, gaining ground but suffering heavy losses
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The Allied "Hundred Days Offensive" begins, breaking German lines
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Alexander Fleming's discovery launched the antibiotic era, drastically increasing human life expectancy.
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The collapse of the U.S. market triggered the Great Depression, a global economic crisis.
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I do not mean that India's independence only lasted this long, but that this is how long it took for India to obtain independence
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while mass murder intensified from 1941, persecution began in 1933 with Hitler's rise to power
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The U.S. was a leading architect and founding member of the UN, established to maintain international peace.
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Japan formally surrenders, ending WW2
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The end of British colonial rule led to the partition of the subcontinent and the birth of two sovereign nations
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This policy established that the U.S. would provide aid to nations threatened by communism, marking the start of the Cold War.
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Developed at Bell Labs, this device became the fundamental building block of modern electronic devices.
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A massive foreign aid program launched to help revive European economies after the war.
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The Berlin Airlift, codenamed Operation Vittles, was one of the first major international crises of the Cold War. It began after the Soviet Union blockaded all land, rail, and water routes into Allied-controlled West Berlin in an attempt to force the Western powers to abandon the city.
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The first U.S. peacetime military alliance, designed to provide a collective defense against Soviet expansion.
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Jonas Salk developed the first successful vaccine against polio, leading to its near-total eradication.
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Joseph Murray performed the first successful living donor kidney transplant in Boston.
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Explorer 1 was launched into orbit, marking the beginning of the U.S. presence in space.
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The mouse was invented at SRI International, and the BASIC programming language was developed at Dartmouth, simplifying human-computer interaction.
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The development of ARPANET and the subsequent World Wide Web transformed global communication and the information age
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Humans landed on the lunar surface for the first time during the Apollo 11 mission
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President Richard Nixon's visit to Beijing was a pivotal step in normalizing relations and reshaping the global balance of power.
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Bill Gates and Paul Allen established the company that would dominate the personal computer software market
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A major diplomatic breakthrough brokered by President Jimmy Carter, leading to a peace treaty between Egypt and Israel.
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The Jarvik-7 was first implanted into a human patient at the University of Utah.
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The North American Free Trade Agreement created one of the world's largest free trade zones between the U.S., Canada, and Mexico
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The International Human Genome Project released a rough draft of the human genetic code, opening new doors for personalized medicine.
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Originally a university networking site, it catalyzed the global social media revolution.
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The collapse of the U.S. subprime mortgage market triggered the worst global economic downturn since the Great Depression.
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Apple's release of the first widely used touchscreen smartphone revolutionized personal technology and mobile internet access.
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A series of pro-democracy protests and uprisings across the Middle East and North Africa that led to the ousting of several long-standing dictators.
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U.S. Navy SEALs killed the al-Qaeda leader in Pakistan, nearly a decade after the 9/11 attacks
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Nearly 200 countries signed a landmark accord to reduce greenhouse gas emissions and combat global warming.
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Both events signaled a rise in populism and nationalism in Western democracies.
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The World Health Organization (WHO) signaled a global health crisis that led to lockdowns, an economic recession, and permanent shifts in remote work.
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The end of a 20-year military occupation coincided with the rapid return of the Taliban to power
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The largest conventional military conflict in Europe since World War II, causing a massive refugee crisis and global energy instability.
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The public launch of generative AI sparked a global "AI Boom," fundamentally changing how information is created and processed.
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A major attack on Israel led to a devastating conflict in Gaza, causing significant regional instability and a global humanitarian crisis.
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Despite rising emissions, 2024 saw record investments in solar power and electric vehicles as the world attempted to accelerate the energy transition
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