March 30 in History
In Sweden, the flagship Mars (a.k.a. 'The Incomparable') was sunk in 1564 in a battle with the Danish fleet at the northern tip of Öland (Sweden’s second largest island, no longer an island according to EU: Öland is no island!).

Internationally, this was the day of the Treaty of Paris in 1856, which ended the Crimean War where Russia lost to a coalition of England, France, the Ottoman Empire and Sardinia. In effect and at least for some time, Russia was forced to restore its possessions along the Black Sea to the Ottoman Empire.

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Eleven years later in 1867, USA buys Alaska, almost 600,000 square miles of land, from a financially strained Russia (at the time called Russian America) for 7.2 million USD (Two cents per acre). The Alaska Purchase was widely criticized at the time, colloquially called “Seward’s Folly” after then Secretary of State William H. Seward.

In 1981, also on March 30, the newly inaugurated president Ronald Reagan and several of his aids were struck by gunfire from would-be assassin John Hinckley. Reagan became the first U.S. president to survive an assassination attempt.