The Russian military have been in the Crimea since back when there were British red coats stationed in New York City. If remaining where they have been for centuries is an invasion.

Can't imagine Americans ever saying the US invaded South Vietnam when it's various puppet Saigon governments asked for fraternal assistance.

> The Russian military have been in the Crimea since back when there were British red coats stationed in New York City

By that logic, next time there's a protest or riot in NYC the British should send in some Royal Marines.

Russia signed a treaty with Ukraine respecting Ukrainian sovereignty and borders in 1997. It broke that treaty - and international law - in 2014 with the occupation of Crimea.

You could argue Crimea should never have been ceded to Ukraine back when both nations were part of the USSR and you may well be right. But if we start allowing military invasions to correct an injustice because part of a country was made part of another country, we'd have eternal conflict. Ask the Serbians about Kosovo, the Irish about Ulster, the Germans about East Prussia, on and on.

Military base and whole peninsula are two different things.

Only Russian nationalists do not know us invaded Vietnam and Russia invaded Ukraine. Everyone else history book are up to date

What vietnam did the US invade and when?