I thought we acquired the US V.I. from the Netherlands in exchange for support during WWI. I don't think we got them through conquest.
"After World War II we have continued to hold Guam and the Marianas Islands, as well as several South Pacific Islands as American Territories."
Ditto here. Weren't they UN designated US possessions after WWII? (Guam might have even been after WWI, or was that Wake Island????) Again, it might be somewhat technical, but they were not acquired by conquest but through international/multi-national agreement.