During these four years of active service Wittgenstein had written his great work in logic, the Tractatus, and the manuscript was found in his rucksack when he was taken prisoner.
Habang ang mga ito ng apat na taon ng mga aktibong serbisyo Wittgenstein had nakasulat sa kanyang magandang trabaho sa lohika, ang Tractatus, at ang mga sinulat ng kamay ay natagpuan sa kanyang rucksack kapag siya ay kinuha bilanggo.