Complex sentence: Campania pentru desrobirea Ardealului si ocuparea Budapestei (1918-1920), ed. Cartea Romaneasca S.A., Bucuresti, 1922 were planted when Transylvania proclaimed union with Romania on December 1,1918.
Split into simpler sentences: Campania pentru desrobirea Ardealului si ocuparea Budapestei (1918-1920). Editura Cartea Romaneasca S.a., Bucuresti, 1922 were planted when Transylvania proclaimed union with Romania on December 1,1918.