It was an exciting time in Poland and a new Kingdom of Poland was declared on 5 November 1916. Alfred Teitelbaum (who had still not changed his name to Tarski) spent a short while in the Polish army after leaving school and then entered the University of Warsaw in 1918, beginning a course which he intended would lead to a degree in biology.
Ito ay nakapupukaw ng isang oras sa Poland at ng isang bagong Kaharian ng Poland ay ipinahayag sa 5 Nobyembre 1916. Alfred Teitelbaum (na hindi pa rin nagbago ang kanyang pangalan sa Tarski) na ginugol ng isang maikling habang sa Polish hukbo matapos-iiwan ng paaralan at pagkatapos ay ipinasok ang University of Warsaw sa 1918, simula ng isang kurso kung saan siya hinahangad ay humahantong sa isang degree sa biology.