Plan 1919 was a military strategy drawn up by J.F.C. Fuller in 1918 during World War I. His plan criticised the practice of physically destroying the enemy, and instead called for tanks to rapidly advance into the enemy's rear area to destroy supply bases and lines of communication...

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PSR B1919+21 is a pulsar with a period of 1.3373 seconds and a pulse width of 0.04 seconds. Discovered by Jocelyn Bell Burnell and Antony Hewish on November 28, 1967, it is the first discovered radio pulsar.

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