How do Ukraine's military capabilities measure up against Russia?

Ukraine’s President Volodymyr Zelenskyy warned Russia after it launched an attack on the country overnight Wednesday that for the sake of Ukrainians' "freedom," "lives" and their "children’s lives, we will defend ourselves."

But how do Ukraine’s military capabilities measure up to Russia?

Moscow has Kyiv both outgunned and outmanned – with at least three times the tanks of Zelenskyy’s defense forces, according to Reuters. Russia has around 900,000 active-duty troops in all branches of the military compared to less than 200,000 for Ukraine, Britain’s Sky News reported.