Royal Italian Navy had submarines built, and named them for Italian colonies, such as Italian East Africa, which was Italian colony located where?
Adua-class submarine: The "Adua"-class submarine was the fourth sub-class of the 600 Series of coastal submarines built for the Royal Italian Navy ("Regia Marina") during the 1930s. Italian East Africa: Italian East Africa (Italian: "Africa Orientale Italiana" ) was an Italian colony in the Horn of Africa.
i don't know