Answer
Pavlichenko participated in two sieges during her military career. The first was the Siege of Odessa, which lasted from August 1941 to October 1941. The second was the Siege of Sevastopol, which lasted from September 1941 to July 1942. Pavlichenko's participation in these sieges was significant, as she was one of the few female snipers to serve on the front lines during World War II.