Ukrainian forces had lost ground day after day in their last stronghold in the eastern region of Luhansk. They mounted a counterattack against Russian troops. By Monday, the two sides were locked in a battle for control.
The forces have converged on what's become one of the biggest ground battles of the war. The Ukrainians had reported losing up to 80 percent of the city. But they said they pushed back the Russians and cleared half the city.
Their President visited towns near the frontline to rally his troops. Volodymyr Zelenskyy said they have "every chance" of fighting back.
British leaders have followed their American allies in announcing they'll supply the Ukrainians with long-range weapons. The M270 missile launchers can strike targets, with precision, up to 80 kilometers away.
Russian Foreign Minister Sergey Lavrov said Russian forces would retaliate by taking more Ukrainian territory.