#TodayILearned that when the Soviet Union dissolved in 1991, Ukraine inherited the world's third largest nuclear arsenal with some 1,700 warheads.

In 1994, #Ukraine gave up its nukes, transferring them to #Russia, in exchange for security guarantees from the US, UK, and Russia.

With Russia's recent invasion of Ukraine, Russia is considered to be in violation of this agreement, and some think it was a mistake for Ukraine to give up it's nukes.

#TIL