Registration of US men aged between 21 and 31 began for troops for WWI.
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NASA's STS-40 became the first spaceflight with three women to be launched into space.
Baltimore and Philadelphia were linked up by telegraph.
Germany invaded France during WWII.
Uncle Tom's Cabin, an anti-slavery novel by Harriet Beecher, was first published.
The US Neutrality Act was enacted.
