France agreed to sell 828,000 square miles of territory that stretched from the Mississippi River to the Rocky Mountains, and which doubled the size of the United States.
Sir Francis Drake entered the Bay of Cádiz and attacked the Spanish naval fleet in an event known as ‘Singeing the King of Spain’s Beard’.
On 28th April 1923, the original Wembley Stadium in London opened with the FA Cup Final between Bolton Wanderers and West Ham United.
The Russian Empire’s State Duma met for the first time at the Taurida Palace in St. Petersburg.
On the afternoon of 26th April 1937, the Basque town of Guernica experienced what is seen by many as the first large-scale modern air raid against a civilian population.
The Peloponnesian League, led by Sparta, defeated Athens in the Peloponnesian War.
On the 24th April 1916, Sir Ernest Shackleton and five companions set off in the James Caird, a recovered lifeboat, to sail from Elephant Island to South Georgia in the southern Atlantic Ocean.
Duke Wilhelm IV of Bavaria signed the Reinheitsgebot, a law to ensure the purity of beer that specified a limited number of ingredients.
On the 22nd April 1915, the Second Battle of Ypres began in Belgium.
The German fighter pilot Baron Manfred Albrecht Freiherr von Richthofen, better known as the Red Baron, was shot down and killed.
On the 20th April 1965, workers began painting skylight windows at the Houston Astrodome to limit glare from the sun.
The Treaty of London was signed, which recognised and guaranteed the independence and neutrality of Belgium.
On the night of 18th April 1775, Paul Revere rode from Charleston to Lexington with his message that “the Regulars are coming!”
The Bay of Pigs Invasion was launched by the CIA-sponsored paramilitary group Brigade 2506.