Russian President Vladimir Putin's announcement broke the silence in wary currency markets ahead of the outcome of policy meetings of major central banks.
Russia's move to deploy its paramilitary forces on Wednesday has sparked new risks in markets.
This caused most major currencies to slide lower, and safe-haven trades to soar.
As a result, the king of the US dollar currency, which is also considered a safe-haven, has reached its latest 20-year high with the dollar index rising at 110.86, as soon as the report on the declaration was released.
While the trading of gold and yen also recorded an increase, the movements of both were limited due to the expectation of an increase in interest rates by the Federal Reserve (Fed).
The euro slipped to a two-week low, not far from the 20-year low it hit earlier this month.
The pound was also dragged to a new 37-year low against the US dollar due to the announcement, as investors focused on the Bank of England (BOE) meeting.
On the other hand, the Aussie and New Zealand dollars showed little reaction as they remained trading bleakly at 2-and-a-half-year lows against the greenback.
