Silent predators stalk the seas of the Philippines! But as the Japanese naval invasion commences, what role did these stealthy subs play in the archipelago’s defense?

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References:

Parrish, Thomas (2004). Submarines: A History. Viking.

Sturma, Michael (2021). “Submarine Special Missions: One Day in the Philippines.” The Great Circle, 34(1), 54-64.

Sayre, Elizabeth E. (September 1942). “Submarine From Corregidor: The Escape.” The Atlantic.

Eisner. Peter (2017). MacArthur’s Spies: The Soldier, the Singer, and the Spymaster Who Defied the Japanese in World War II. Viking.

Heritage NSW. “The Japanese midget submarine program." heritage.nsw.gov.au