21 November 1916 November 20, 2013 Author: Staff A mine explodes and sinks HMHS Britannic in the Aegean Sea. 30 people are killed. Famous Words of Inspiration..."Perpetual optimism is a force multiplier." Colin Powell — Click here for more from Colin Powell Related posts: 26 February 1914 18 December 1916 21 February 1916 25 April 1916 7 October 1916 21 November 1964 21 November 1970 Categories: History Tags: 1916, 21 November