During World War II he joined the ZWZ resistance organization and later the Home Army (Armia Krajowa).
[1] Before Poland's return to independence, Bokszczanin served in the Russian imperial army prior to the outbreak of World War I in 1914.
During the Polish Defensive War of 1939 he led his unit in the ranks of Col. Stanisław Maczek's 10th Motorized Cavalry Brigade (Poland), however he did not cross the border with Hungary and avoided being captured by the Germans and Soviets.
[1] As one of the most experienced Polish specialists in war of manoeuvre, in 1940 he joined the ZWZ resistance organization, later to be reformed into the Home Army.
He then joined the Wolność i Niezawisłość organization created to disarm the former Armia Krajowa units and help them find their place in communist-ruled post-war Poland.