On this date in 1440 the Prussian Confederation was formed. France promptly surrendered.
On this date in 1848, Marx (the un-funny one*) and Engels published the Communist Manifesto. IQ's of college PoliSci departments began a decline that has not reversed to this day**.
* Imagine how much better the world would be if it was the ideals of Harpo Marx, rather than boring ol' Karl, that caught on. It's hard to massacre people with bicycle horns.
** The nadir was almost reached at the start of the 2007-08 academic year, when UC Berkely considered offering a faculty gig to a head of cabbage. They'd have done it, too, if protesting vegans hadn't pointed out that being required to teach undergrads was unfair oppression of a vegetable.