The New Orleans-class cruisers were the last U.S. cruisers built to the specifications and standards of the Washington Naval Treaty of 1922. Such ships, with a limit of 10,000 long tons (10,160 t) standard displacement and 8-inch (203-millimetre) calibre main guns may be referred to as “treaty cruisers.” Originally classified a light cruiser, because of her thin armor, she was reclassified, soon after being laid down, a heavy cruiser, because of her 8-inch guns. The term “heavy cruiser” was not defined until the London Naval Treaty in 1930.
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