In a referendum, they overwhelmingly voted to form a union with Russia.
But now, ethnic Tatars fear inter-ethnic conflict. And their mood, is somber.
They make up 12 percent of Crimea's population.
The Tatar regional leader is concerned.
(SOUNDBITE) (Russian) TATAR REGIONAL LEADER, MUSTAFA ASABA, SAYING:
"There will be people who may leave. That's for sure. But that will be a very small fraction. The main part, 90-95 percent of the population will remain here under any circumstances because Crimea is our motherland. We don't have any other motherland."