If Crimea’s reunification with Russia hadn’t taken place, the US would have turned it into a protectorate. It would have deployed weapon systems in the peninsula as they are doing in Romania, and thus be able to deny access to Russian vessels to the Black Sea. Ukraine would have given the Sevastopol base to NATO for military purposes.
Humanitarian aid in Syria has served as a cover. In the middle of the victuals there were weapons of all origin. It might happen in Venezuela too, we do not know.