Ukraine as the war enters a deadly new phase, according to the Ukrainian president.Missile blasts and troop movements were witnessed across the Donbas region on Monday, only days after Vladimir Putin withdrew Russian forces from the area around Kyiv to focus on capturing land near the Russian border.Volodymr Zelenskyy described the development as the beginning of the "Battle of Donbas" and said the Ukrainian army had been expecting the latest assault.Striking a defiant tone in the rousing speech, the actor-turned-President claimed he was confident his army could repel the invaders.He said in a video address: "We can now say that Russian forces have started the battle of the Donbas, for which they have long prepared."No matter how many Russian soldiers are driven there, we will fight. We will defend ourselves.