From 1942, he organized the secret Polish Western Union [pl].

In February 1944, he became vice-president of the Centralisation of the Democratic, Socialist and Syndicalist Parties [pl].

He fought in the Warsaw Uprising as a lieutenant in the ranks of the 104th Company of Syndicalists.

In 1950, the Security Office undertook investigative measures against Szwedowski, to prepare a trial for organizing a "conspiracy in the communist leadership during the Second World War."

In 1973, just before Szwedowski's death, the Ministry of Public Security considered taking steps to take over the archive of the syndicalist movement he owned.