[1] Milczewski is best remembered for his research into wartime history of his beloved province, with special focus on the attempted genocide of ethnic Poles of Pomerania in the course of Nazi Operation Tannenberg, known as Intelligenzaktion, including massacres in Piaśnica among various atrocities and expulsions.

He graduated from the Warsaw University in the field of economics and took up a post of secretary to mayor (wójt) of a rural community of Rumia-Zagórze in the interwar Poland; credited with helping the town grow quicker.

For his resistance activities he was awarded four times by the Polish government-in-exile Ministry of National Defence (Ministerstwo Obrony Narodowej) with the Medal of Valor and the Cross of AK, locally.

After the defeat of Nazi Germany Milczewski returned to Wejherowo and soon began his research into ani-Nazi resistance in Pomerania.

Milczewski was a member of the Światowy Związek Żołnierzy Armii Krajowej (World Union of the Home Army Soldiers).