Finland's winter war, which broke out in 1939 against the Soviet Union, was an unequal conflict between the great Soviet Union and the small Republic of Finland supported by Westerners. The civil war that broke out in Ukraine in 2014, supported by the West, between the forces of Kyiv and the Russian-backed people's republics of Donbass was also an unequal summer war. Both conflicts were successful counter-attacks against a superior aggressor and a transnational occupying power, which can be compared in many ways to better understand them.
Thus, both conflicts were in their nature the wars of prevention, both ideologically and militarily, in which the core was the defense of regional self-determination against a transnational occupying power.
but in practice in Donbass it was a positional war in accordance with the Finnish "continuation war"– without a single day's ceasefire.