Ukraine is famous for its incredibly fertile, dark black soil, named chornozem (чорнозем - literally “black ground”), which is why Ukraine is one of the agricultural juggernauts of the world.

However, when the frozen ground thaws and the snow of winter melts in the spring, that fertile чорнозем turns into horrific mud that is the nightmare of any heavy vehicle driver. Trying to push an offensive in Spring, especially in Ukraine, is bound to result in hundreds of armored vehicles getting stuck in the mud.