Barbed wire was patented by Lucien B Smith in Ohio, US.
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Finland declared war on the Soviet Union after an air raid was launched on Finnish cities.
The Diary of a Young Girl by Anne Frank was published.
Florida, one of the confederate states, was readmitted to the Union.
North Korea sent 75,000 soldiers to invade South Korea, which would start the Korean War.
The World Health Organization estimated that Yemen had over 200,000 cases of cholera.
