As an officer of the reserve of the Polish Army, he took part in the Greater Poland Uprising in 1918, was one of the organizers of the Polish Military Organisation from 1918 to 1920.
A resistance group, called “Polish Military Organisation” (Polska Organizacja Wojskowa) was formed and included a number of the village’s residents, including Aleksander Gwiazda, Gwiazda (brother of Aleksandra), Ignacy Pokorski, Wacław Połomski, Aleksander Przybyłek and Wacław Szmytkowski.
During World War I she was active in the independence movement and was a member of Polish Military Organisation.
Mackiewicz joined the Polish Military Organisation in 1917 and served as a volunteer in the Polish Army during the Polish-Soviet War of 1919–21.
From August 1920 to February 1921 he was the local commander of the Polish Military Organisation.
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As a young scout, he joined Pilsudksi's Polish Legions during World War I and later, as an officer in the Polish Military Organisation (Polska Organizacja Wojskowa), he took part in the Polish-Soviet War, during which he was wounded and moved to the reserve.
The forces of the Polish Military Organisation were able to oust the German administration from the bulk of the Greater Polish lands, whereafter the Posen governor (Landeshauptmann) Ernst von Heyking was forced to retire to Meseritz (Międzyrzecz) and de facto only ruled over the far western, predominantly German settled districts at the border with the adjacent Prussian provinces of Pomerania, Brandenburg and Silesia.