Finland declared war on the Soviet Union after an air raid was launched on Finnish cities.
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Barbed wire was patented by Lucien B Smith in Ohio, US.
Canada swore in Kim Campbell as the nation’s first female Prime Minister.
The rainbow flag was flown for the first time at the San Francisco Gay Freedom Day Parade.
Virginia became the 10th state to join the United States of America.
American colonies recorded their first astronomical event after observing a lunar eclipse.
