Russian Winter, sometimes personified as "General Frost" or "General Winter", is an aspect of the climate of Russia that has contributed to military failures of several invasions of Russia. Mud is a related contributing factor that impairs military maneuvering in Russia and elsewhere, and is sometimes personified as "General Mud". Russians call those muddy conditions rasputitsa, which occur with autumnal rains and spring thaws in Russia and make transport over unimproved roads difficult.