What is the current state of Russia's military arsenal

Ukraine declared a nationwide air raid alert on Thursday as Russia continues its missile attacks. The head of Ukraine's army, Valery Zaluzhny, said Russia launched 55 air and sea-based missiles. "Ukraine's armed forces destroyed 47 cruise missiles, 20 of them in the area of the capital," he added on the Telegram messaging service. The Russian military has been firing missiles and drones at critical infrastructure, notably energy facilities, since October. Kyiv's mayor, Vitali Klitschko, said one person had been killed in the capital, the first death there from an attack in the capital since New Year's Eve. He said two other people were injured in the strike. Ukraine's military said it downed all 24 Russian drones fired at the country overnight, including 15 in the Kyiv region, with no reports of damage in the capital. Main battle tanks are an essential part of modern "combined arms" fighting. Artillery softens-up enemy positions in occupied areas of Ukraine. The tanks spear ahead advances to re-take those occupied territories. Dismounted troops from mechanized infantry support the tanks by removing enemy infantry and shoulder mounted anti-tank weapons. And regular infantry occupy the formerly Russian-occupied areas, preventing Russians returning.