Births on April 12

Hound Dog Taylor, American singer-songwriter and guitarist (d. 1975)

Theodore Roosevelt "Hound Dog" Taylor (April 12, 1915 – December 17, 1975) was a Chicago blues guitarist and singer.

6 Mar

Airship
Italo-Turkish War: Italian forces become the first to use airships in war, as two dirigibles drop bombs on Turkish troops encamped at Janzur, from an altitude of 6,000 feet.
15 Apr

Sinking of the RMS Titanic
The British passenger liner RMS Titanic sinks in the North Atlantic at 2:20 a.m., two hours and forty minutes after hitting an iceberg. Only 710 of 2,227 passengers and crew on board survive.
14 Oct

Theodore Roosevelt
While campaigning in Milwaukee, the former President of the United States, Theodore Roosevelt, is shot and mildly wounded by John Schrank, a mentally-disturbed saloon keeper. With the fresh wound in his chest, and the bullet still within it, Mr. Roosevelt still carries out his scheduled public speech.
17 Oct

First Balkan War
Bulgaria, Greece and Serbia declare war on the Ottoman Empire, joining Montenegro in the First Balkan War.
26 Oct

Thessaloniki
First Balkan War: The Ottoman occupied city of Thessaloniki, is liberated and unified with Greece on the feast day of its patron saint Demetrius. On the same day, Serbian troops captured Skopje.