He was at the height of his power during the 1260s and 1270s. He also led campaigns against Pinsk and other Slavic territories and therefore could not fully support the uprising. However, the Old Prussians and other Balts were losing their power.
Skomantas" estate was devastated in 1280–1281 and he escaped with three sons, Rukals, Gedetes and Galms, to Black Ruthenia, controlled at that time by the Grand Duchy of Lithuania.
However, he soon returned, was baptized in the Roman Catholic rite, and acknowledged the superiority of the Knights. Skomantas went on to lead armies on behalf of the Knights and was awarded lands within Prussia.
His tribe lost the fight against the Knights and did not survive as an entity.