Poland’s aging main battle tank gained new relevance when the country sent an unspecified number of these tanks to Ukraine. It’s likely to be a formidable addition to the aging Soviet T-64s and T-72s Ukraine is already using to defend itself against Russian forces. Introduced in 1995, the Twardy (meaning “hard” or “tough”) is an updated version of the T-72 but features Polish-made ERAWA explosive-reactive armor across the surface of the vehicle, with a double layer of explosive on the hull and turret. It also adds a modern auto-loading mechanism to the 2A46 125mm main gun, which eliminates a crew member and enables faster firing.