1268 marks the first year in which, Wartislaw II, is named the ruler of Białogarda, in any existing documentation.

[5][6] Mestwin II wasn't satisfied with the partition, being in the belief that, as the oldest heir, he hold the right to Gdańsk, the most prestigious city in Pomerelia, and the capital of his father's state.

On 1 April 1269, he met in Choszczno, with John II, Otto IV, and Conrad, the margraves of Brandenburg, from the House of Ascania, from Stendal.

The exact origin of his army remains unknown, however, they could have been either the mercenaries from the State of the Teutonic Order, or the reinforcements sent from the Margraviate of Brandenburg.

Most likely at the beginning of 1270, he conquered the Duchy of Lubiszewo, with no major resistance, as Sambor II with his army were at the time in Kuyavia.

Wartislaw was given a fort in Wyszogród, where, he would organize the operation base for his future attack on Mestwin's territories.