Editing Petras Kubiliunas (section)

==World War I==
Kubiliunas graduated from a Gymnasium in Riga and continued his education in Vilnius military school, graduating in 1914. During World War I, he participated in military operations in Riga's Latvian regiment.

In August 1919, Kubiliunas was mobilized to the Lithuanian Armed Forces and participated in the Lithuanian–Soviet War until December 1919. He commanded a battalion of the 3rd Infantry Regiment and later became deputy commander of 4th Infantry Regiment. In February 1920 Kubiliunas was transferred to the 1st Border Guards Regiment, and in 1923 became a commander of its battalion. In 1924 Kubiliūnas became commander of a tank battalion, later motorized battalion.