Turkey didn't annex Northern Cyprus. Nor did Albania annex Kosovo, nor Russia itself annexed South Ossetia, Abkhazia and Transnistria before.
It's the combination of invasion and annexation - effectively, waging war for a formally acknowledged territorial gain - that makes the situation in Crimea unique post WW2.
It's the combination of invasion and annexation - effectively, waging war for a formally acknowledged territorial gain - that makes the situation in Crimea unique post WW2.