Petro Dyachenko was a Ukrainian military commander who served as a staff captain in the Russian Army, colonel in the Ukrainian People's Army, major in the Polish Army, officer in the Volhynian Self-Defence Legion, commander of Panzerjagd-Brigade Vilna Ukraina, and Colonel in the Ukrainian National Army and commander of the 2nd Division UNA. During the First World War Dyachenko served with the Russian 333rd Infantry Regiment. He joined the Ukrainian National Republic in its struggle against both White and Red Russian forces. Since February 23, 1918 he was successively in command of the 2nd Zaporozhian Rifle Regiment and 1st Zaporozhian Rifle Division of the UNR army as a battalion commander. After the reorganization of the army on July 23, 1918, he took command of the Independent Zaporozhian Rifle Regiment. After the fall of Kiev to the Bolsheviks and collapse of the Ukrainian state, he was interned in Poland together with the remaining Ukrainian soldiers. On July 20, 1928 he joined the Polish Army. In 1928 he served as company commander in the 1st Polish Chevauleger Regiment. On January 1, 1934 he became deputy commander of the 3rd Polish Mazovian Chevauleger Regiment. As a major he fought in the Polish Army in September 1939. After capitulation, as an officer of the Polish army, he was captured and sent to a German POW Camp. On July 25 Dyachenko became member of the Ukrainian Central Committee formed in Kraków on the German side. Dyachenko was in the staff of Polissian Sich in 1941. In March 1944 he took part in organizing the 31st Schutzmannschafts Battalion, controlled by Nazi Germany. In August 1944 he became commander of the 31. Schutzmannschafts-Bataillon der SD. After the outbreak of the Warsaw Uprising, Dyachenko was ordered to organize a military unit out of the battalion and he participated in crushing of Polish resistance against Nazis. On January 30, 1945 he became commander of the 3rd U.V.V Regiment. In February 1945 he commanded the Panzerjagd-Brigade Freie Ukraine. In April 1945 he was commander of the 2nd UNA Division. In 1945, remnants of the Vilna Ukraina were attached to General Pavlo Shandruk's army, forming the Ukrainian National Army. On May 7, 1945 Dyachenko was promoted to the rank of general by Gen. Shandruk. For his actions during the Battle of Bautzen, Dyachenko was awarded with the Second ClassIron Cross in 1945. In May 1945 he and the remnants of the 2nd UNA Division surrendered to the US forces in Austria. Later on, he lived in West Germany and the United States. In 2015 Dyachenko was commemorated by Ukrainian Parliament with special state celebrations in his memory, raising protests in Poland
