Mezue ahịrịokwu na-esonụ: Ndị Soviet kpagburu ezinụlọ Bačkis na Lithuania; nwanne ya nwoke Juozas bụ
A chụgara ya Siberia na June 1941 ebe ọ nwụrụ otu afọ mgbe e mesịrị. Ndị Gestapo jidere Klimas na Septemba 1943 nke hapụrụ Bačkis onye nnọchi anya ndị isi na France. N'otu afọ ahụ, Bačkis gbachitere PhD ya na Lithuanian Concordat (bipụtara na Lithuanian na 2007; ). Mgbe agha ahụ gasịrị, France amataghị ọrụ ndị nnọchi anya Lithuanian, Latvian, ma ọ bụ Estonian, mana ha kwere ka ha rụọ ọrụ na-enweghị isi. Bačkis gara n'ihu ịkụziri ndị ọrụ gọọmentị dị iche iche banyere ọrụ Lithuania na ịgba mbọ maka ịghara ịnakwere Lithuanian SSR iji hụ na ịga n'ihu nke steeti. O biputekwara akwụkwọ akụkọ banyere ihe ndị Lithuanian (gụnyere mbipụta 33 nke "Ajụjụ Lithuaniennes", mbipụta 8 nke "Bulletin Lithuanien", na akwụkwọ "Peuples opprimés. La tragédie des Etats Baltes"), nyeere ndị gbara ọsọ ndụ Lithuanian aka, wdg. Na 1948, Bačkis mere kọntaktị na Juozas Lukša, onye na-emegide ndị Soviet nke jisiri ike gbapụ na Iron Curtain, ma nyere ya aka ịgbasa ozi banyere ọgụ agha. Na 1949, Kọmitii nke Mba Ndị Dị n'Etiti na n'Ebe Ọwụwa Anyanwụ Europe, nke onye nnọchiteanya Britain bụ́ Harold Macmillan duziri na nke na-anọchite anya mba dị iche iche dị n'Ebe Ọwụwa Anyanwụ Europe, bụ nke Òtù Europe guzobere. Bačkis ghọrọ osote onye isi oche nke Kọmitii na 1951. Ọ bụkwa onye nnọchi anya Lithuanian na Union of European Federalists, sonyeere Nouvelles équipes internationales (New International Teams), na Assembly of Captive European Nations. Bačkis gbakwara ume ka e guzobeghachi Lithuanian Catholic Academy of Science ma na-arụsi ọrụ ike na-ewepụta akwụkwọ nyocha na nnọkọ ya. Na 1950, Vatican nyere ya Order nke St. Gregory Onye Ukwu.