However, there were a few significant issues that held the Tsar Tank back and ultimately prevented it from graduating past a prototype. First, it was prone to getting stuck in uneven terrain ...

However, the first tests were unsuccessful. The Tsar Tank's rear roller got stuck in the ground as soon as the vehicle came off its supporting base, and could not be budged. The problem turned out ...

when the Tsar Tank was ready in 1915 and tests began, major disadvantages were discovered. Despite the tank crushing trees like matchsticks with its giant wheels, it could easily become stuck fast ...

The Tsar tank has achieved almost mythical status since ... its tricycle design often resulted in its back wheel getting stuck and its lack of armour left its operators exposed to artillery ...

But they were always subject to intensive scrutiny by Ukrainian intelligence—hence the interest in the stuck Tsar Tank. How the 12th Azov Brigade fetched the tank is, by now, well-known.