Jan Sieńko was born on 19.10.1919 in Polkowo, in the district of Augustów, in Białystok region. He died on 17.05.1944. He was buried at the Polish War Cemetery at Monte Cassino. At the time of death, he served in the 4th Infantry Battalion as a fusilier.
If you could provide more information about this or other buried person, we would be very grateful for your help: rada[at]radaopwim.gov.pl , mediolan.kg.sekretariat[at]msz.gov.pl