April 7 (UPI) -- On this date in history:
In 1862, Union forces under the command of Gen. Ulysses S. Grant defeated the Confederates at Shiloh, Tenn.
In 1922, under the direction Secretary of the Interior Albert Bacon Fall, petroleum reserves at Wyoming's Teapot Dome Oil Field were leased without competitive bidding to private companies. A Senate investigation ensued, leading to a bribery case that would become known as the Teapot Dome scandal.
In 1947, auto pioneer Henry Ford died in Detroit at the age of 83. In 1896, he built his first self-propelled, gas-engine vehicle, and in 1903 incorporated the Ford Motor Company. He is credited for developing the first affordable, mass-produced car, the Model T, and pioneering the assembly line.
In 1990, suspected arson fires aboard the ferry Scandinavian Star killed at least 75 people in Scandinavia's worst post-war maritime disaster.
In 2010, air travel resumed, most roads reopened and crews worked to restore power in Rio de Janeiro after a rainstorm and mudslide left more than 133 people dead.
In 2011, a 23-year-old former student returned to his public elementary school in Rio de Janeiro and opened fire with two revolvers, killing 12 children and injuring 12 others before shooting himself in the head as police closed in.
In 2013, al-Qaida leader Ayman al-Zawahiri used an Internet video to urge rebels in Syria to fight to establish an Islamic state governed by Sharia law.
In 2017, the United States fired 59 Tomahawk missiles into a west Syrian airfield from where it was believed President Bashar al-Assad's regime launched a deadly chemical attack that killed and injured hundreds of civilians.
In 2018, forces loyal to Syrian President Bashar al-Assad launched a gas attack in the town of Douma, killing some 40 people.