Sikorski was born in
Lemberg,
Austrian Galicia, and graduated from the local
technical college. Before World War I, he was an active member of several Polish paramilitary organizations, including
Union of Active Struggle and
Riflemen's Association. In 1912, he completed a military course for officers, and joined
Polish Legions in World War I, as battalion commandant in the 3rd and later 4th Infantry Regiment. In January 1915, Sikorski was promoted to captain. After the
Oath crisis of 1917, he was arrested, and forced to join the
Austro-Hungarian Army. In January 1918, he became the commandant of Lwów District of
Polish Military Organisation. In November 1918, Sikorski joined the newly created Polish Army, serving as commandant of the 13th Rifle Regiment of the 4th Division of Polish Rifles (General
Lucjan Żeligowski). As commandant of the 20th Infantry Brigade, he fought in the
Polish–Soviet War, including the
Battle of Warsaw (1920) and in Eastern Galicia. In December 1920, Sikorski entered
Wyższa Szkoła Wojenna, studying there until April 1921. After completion of his course, he was named commandant of the
10th Infantry Division. Transferred in early 1923 to the
6th Infantry Division, he remained there until July 1926. During the 1926
May Coup (Poland), he supported
Józef Piłsudski. From July 1926 until March 1932, Sikorski commanded the
9th Infantry Division. On 16 March 1927 he was promoted to the rank of
General brygady. On 30 June 1933 Sikorski retired from active service, settling in Warsaw. On 5 September 1939 he was evacuated to
Brzesc, and then to Lwów, where he took over the command of the city on 12 September, fighting in the
Battle of Lwów (1939). After capitulation he was imprisoned by the Soviets in the camp for
Polish prisoners of war (POWs) at
Starobilsk. Together with nearly 3800 Polish POWs held at the prison in Starobilsk, General Franciszek Sikorski was
murdered by the
NKVD in the spring of 1940 in
Kharkiv, aged 50. On 5 October 2007 President
Lech Kaczyński posthumously promoted him to
Divisional general. ==Family==