I don't get why crimea tag has been removed.
If it's some policy like "only nation tags, no regional tags" it makes no sense: nations have a limited span in time and space, so it's completely arbitrary to only allow them as a tag. Please notice that Ukraine itself wasn't an indipendent nation until the dissolution of the USSR.
Plus, it's not like it's a minor region, it has already been the core of some important conflicts.
edit: I just noticed I was likely confused with Politics SE, so I'd say we can close this (unless you want to discuss about creating such a tag, while you're at it)