OTTAWA—Canada is deploying hundreds more troops to eastern Europe and imposing new sanctions on Russia in response to President Vladimir Putin’s decision to send forces into two regions of eastern Ukraine, Prime Minister Justin Trudeau announced Tuesday. “We are looking for Russia to stand down, to cease its violations of Ukrainian sovereignty, Ukrainian territorial integrity, to return to negotiation tables,” Trudeau told a news conference in Ottawa. Putin’s move to send in troops to the Donetsk and Luhansk regions came hours after he signed a decree recognizing those areas as independent, and said Russian troops were being deployed as “peacekeepers.” Donetsk and Luhansk have been embroiled in fighting for the past eight years after Russia annexed Ukraine’s Crimea peninsula and started providing support to pro-Russian separatists in the two eastern regions. An estimated 14,000 people have died in that conflict. Trudeau condemned Putin’s actions as he appeared alongside Deputy Prime …