[int_19h]

It's not that simple. If you go to Crimea and commit a crime without getting arrested, and then travel to Ukraine and they find out, they will arrest you and try you under Ukrainian law.

And if you try to cross the border from Crimea to Ukraine, the Ukrainian side will not ask you if you "want to enter Ukraine". They consider Crimea to be Ukrainian, so they'll treat you as somebody who is already on Ukrainian territory, just passing through an internal checkpoint. Which means that you must have had entered Ukraine legally before, and then traveled from there to Crimea, and back. If you try to enter Crimea from Russia, and then from there to Ukraine, then as far as Ukraine is concerned, you have committed an illegal entry at the moment you entered Crimea without going through a legitimate border checkpoint - so they'll just arrest you for that.

Furthermore, if you try to enter Ukraine at any other border crossing, but they have evidence that you have previously entered Crimea from Russia, they will also treat that as a past illegal entry.

[Bendingo]

> you have committed an illegal entry at the moment you entered Crimea without going through a legitimate border checkpoint - so they'll just arrest you for that

This is true.

A few years ago I flew from Moscow to Simferopol (Crimea) and was advised that to not visit Ukraine in the future, for risk of arrest at the border. I'm not sure how Ukrainian border authorities would know of my visit to Crimea, since there is no record of it in my Australian passport, but I would not want to take the risk.

[vogre]

There is nothing that Ukraine can do to prevent you from visiting Crimea, except punishing you later if they know somehow. So they have no real power or influence over peninsula.