Analysis of information sources in references of the Wikipedia article "Śmiały (armoured train)" in English language version.
[PP 53] then withdrew towards Lwów with PP 55. Arriving in the town on the 18th [of September 1939], the two trains were captured when Lwów fell to the Red Army
[PP 53] then withdrew towards Lwów with PP 55. Arriving in the town on the 18th [of September 1939], the two trains were captured when Lwów fell to the Red Army