Share This Article 1. During World War Two, Sweden returned hundreds of interned Allied airmen in exchange for this. Trading rights across the Baltic Sea $1000 in gold per airman Ten B-17 bombers Interned Swedish citizens 2. The first monument memorializing a Civil War battle was built in this year. 1865 1914 1888 1890 3. This was the first submarine adopted for use by the U.S. Navy. USS Alligator USS Duck USS Turtle USS Nautilus Loading …