On this day: April 25

Published On: Apr 25 2013 02:02:45 PM CDT   Updated On: Apr 25 2014 01:00:00 AM CDT

The guillotine is first used, American and Soviet troops cut Nazi Germany in two, a U.S. Navy submarine completes the first submerged circumnavigation of the globe, and the Hubble Space Telescope is launched, all on this day.

OTD April 25 - Mexican-American War
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1846: Open conflict between American and Mexican troops begins over the disputed border of Texas. The two days of fighting, known as the Thornton Affair, saw 2,000 Mexican soldiers defeating an American army patrol of 70 men, leaving 16 American soldiers dead and triggering the Mexican-American War.

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