The Army headquarters eventually withdrew to Iași, with Rosetti assigned to write for the military propaganda magazine, "România". In January 1918, while the Moldavian Democratic Republic began its process of unification with Romania, Rosetti signed his name to a manifesto calling for the cultural unification of all Romanian-inhabited regions; other signers included Minulescu, Ion Agârbiceanu, Nichifor Crainic, Mihail Sadoveanu, and Mihail Sorbul. Rosetti eventually returned to Bucharest following the November 1918 Armistice. In 1919, he and Mille were part of a defense team that represented the leadership of the Socialist Party of Romania, tried for their role in a general strike of the previous December. He was an independent candidate for the Ilfov seat in the Assembly in the election of November 1919, but only took 5,234 votes.