Jonas Galvydis-Bykauskas

Jonas Galvydis-Bykauskas (15 December 1864 – 16 July 1943) was a Lithuanian general who served in the Imperial Russian Army and the Lithuanian Army. He was the supreme commander of the Lithuanian Army from 9 April to 7 July 1920.

Galvydis-Bykauskas joined the Russian Imperial Army in 1885. He graduated from the Saint Petersburg Infantry Cadet School and the Officers' Rifle School. In 1911, he was assigned to the 18th Siberian Rifle Regiment with which he fought in World War I. He was promoted to colonel and became regiment's commander, but was captured by the Germans in January 1916 and kept in POW camps until early 1918.

He returned to Lithuania and joined the newly established Lithuanian Army becoming the commander of the 1st Infantry Regiment in November 1918. However, in early January 1919, after a conflict with several regiment's officers he was appointed the first director of the War School of Kaunas. On 1 January 1920, Galvydis-Bykauskas became commander of the 3rd Division which was deployed near Daugavpils. In addition, on 9 April 1920, he became the acting supreme commander of the Lithuanian Army replacing Silvestras Žukauskas. In this role, Galvydis-Bykauskas was replaced by Konstantinas Žukas on 7 July 1920. On 23 October 1920, few days after the Żeligowski's Mutiny, Galvydis-Bykauskas was appointed acting commander of the 2nd Division but the division did not participate in combat. He was dismissed from the 2nd Division on 1 February 1921.

Galvydis-Bykauskas as a representative of the Lithuanian Christian Democratic Party was elected to the Constituent Assembly of Lithuania which convened in May 1920. He spoke most frequently spoke about issues concerning military and the Lithuanian Riflemen's Union. He resigned from the assembly on 17 December 1921 and returned to the War School of Kaunas. The school was transformed from a school that catered to the urgent needs at the frontline into a peacetime school for junior officers. Galvydis-Bykauskas was released to the reserve in August 1926.

After the Soviet occupation of Lithuania in June 1940, Galvydis-Bykauskas was arrested by the NKVD in June 1941. However, he was freed from Kaunas Prison after the German invasion of the Soviet Union on 22 June 1941. Galvydis-Bykauskas died on 16 July 1943.