|Shipyard||Kaiserliche Werft, Danzig (Werk 14)|
|Ordered||25 Nov 1910|
|Laid down||7 Nov 1911|
|Launched||18 Dec 1912|
|Commissioned||5 Aug 1913|
|Successes||37 ships sunk with a total of 145,830 tons.|
2 ships damaged with a total of 2,643 tons. (View ships hit by U 20)
|Fate||4 Nov 1916 - Grounded at 5633N 0808E on the Danish coast and blown up by her crew the next day.|
On 7 May, 1915 U 20 (Kptlt. Walther Schwieger) torpedoed the British liner RMS Lusitania. She sank in 18 minutes, taking 1195 lives with her, including 123 Americans. This sinking pushed the Americans slightly closer to declaring war on Germany, but that would not take place until April 1917.
There was another U 20 in World War Two
That boat was launched from its shipyard on 14 Jan 1936 and commissioned into the Kriegsmarine on 1 Feb 1936. Take a look at U 20 from WWII.