Zelenskyy says: We begin to feel the strain as Russia tossing more soldiers into fight

Ukraine's military is preparing for mass Russian bombardments across the country any day now as Moscow's invasion nears the one-year mark.

President Volodymyr Zelenskyy told the nation in his nightly address Sunday that Russia has thrown more troops into battle.

"We see this increased pressure in various areas of the frontline, as well as pressure in the information field," he said.

"It is very difficult in the Donetsk region - there are fierce battles. But no matter how hard it is and no matter how much pressure there is, we have to withstand it."