Russian military forces escalated attacks on civilian areas of Ukraine’s largest cities Wednesday as the nation’s leaders pledged to repel the invaders and the citizenry joined the military effort to defend their battered country.

“We are a people who in a week have destroyed the plans of the enemy,” Ukrainian President Volodymyr Zelenskyy said in a video address early Thursday local time. “They will have no peace here. They will have no food. They will have here not one quiet moment.”