SS Teiryu Maru was a steam cargo ship that was launched in England in 1914 as Northwestern Miller.

In 1944 a US Navy submarine sank her in the South China Sea, killing 149 of her passengers and crew.

[1] Northumberland SB Co also built her sister ship Southwestern Miller, which was launched on 17 December 1914 and completed in June 1915.

It was driven by a three-cylinder triple expansion engine built by Richardsons Westgarth & Company of Hartlepool.

They were intended to bring grain from the Pacific coast of North America through the Panama Canal, which opened in August 1914.

Augsburg was laid up in Dairen[5] to avoid the risk of being captured by the Royal Navy Far East Fleet.

[8] From 15 July 1944 Teiryu Maru was one of eight merchant ships in Convoy Yuta-9 from Sana bound for Takao in Japanese-ruled Taiwan.

[5] On the morning of 19 July 1944 the Gato-class submarine USS Guardfish's radar found Yuta-9 in the South China Sea.

At 0745 hrs JST Guardfish hit Teiryu Maru's port side with one torpedo, flooding her boiler room.