The US cannot move military ships into the Black Sea, so could not have landings in Odesa. Anyway, it is much easier to just move troops by land from Poland.... Assuming that the USA wanted to move troops into Ukraine.I got told yesterday that one of the reasons the Imperial Empire will not allow Russia to have Odessa is that they want to make sure that it is available to land large numbers of troops and supplies to invade Crimea and the rest of Russia.