Titanic Sister Ship, Britannic Sinking by Germans – WW1 1916 July 5, 2023 nidhi History, Military History Home » History » Titanic Sister Ship, Britannic Sinking by Germans – WW1 1916 History Documentaries On the 21st November 1916, HMHS Britannic, sister ship to The Titanic, was sunk by a mine in the Aegean Sea. Credit The History Chap Please support our Sponsors -