After the Soviet occupation of Lithuania in June 1940, Alantas fled to Germany.
His wife and son remained in Lithuania and were deported to Siberia during the June deportation in 1941.
In Germany, he was invited to head the Commission of Culture of the Lithuanian Activist Front, a movement of Lithuanian exiles who sought to liberate Lithuania with Nazi German support.
Alantas belonged to the radical right wing of the LAF and supported establishment of the Lithuanian National Socialist Party.
Despite being offered by Pranas Germantas to head the Commission of Culture in the Ministry of Education in the Provisional Government of Lithuania, his appointment was blocked by the Party of Lithuanian Nationalists and he was appointed as the head of Vilnius Drama Theatre instead.
During three years of work, Alantas wrote three plays, two of which were staged.
In 1944, Alantas fled to Germany from the approaching Soviet army and became a displaced person in the aftermath of World War II.
In 1949, Alantas moved to Detroit, United States, where he worked as a low-wage labourer in a Ford Motors automobile factory until retirement in 1968.
He knew French and German, but struggled with English.
He dedicated the rest of his life to literary work and published several novels, short stories, and a poetry collection.
He was chairman of the Lithuanian Journalists Association in 1967–1971, and was offered jobs editing Lithuanian periodicals but he refused.

In exile, Alantas's views grew increasingly esoteric and are exemplified in his first novel Pragaro pošvaistės (Patches of Hell).
Searching for a psychological refuge, he began glorifying Baltic paganism and pre-Christian Lithuanian culture and denounced Christianity as a foreign, imposed influence.
He equated Lithuanian national ideology with a return towards pagan humanism, and championed a worldview in which Lithuanians would recognize only Praamžius, the chief god of Baltic paganism, in the metaphysical, humane solidarity between fellow Lithuanians in the moral, and the principle "kill your enemy if you're able, perish yourself if you're not" in the political prism.
In emigration, Alantas published two non-fiction books.
In 1976, he wrote a study on Romas Kalanta who self-immolated in Kaunas protesting the Soviet regime in 1972.
He wrote Tauta istorijos vingiais (The Nation Along the Twists of History) in 1987 and published it in 1990.
It contains thoughts on the survival of the small nation, national character and identity of Lithuanians, meaning and value of the anti-Soviet resistance by the Lithuanian partisans.
The work was republished in independent Lithuania in 1992.
That year, the Ministry of Culture and Education proposed to include the book in the history curriculum for the 12th grade, but the proposal was quickly dropped.
After the Soviet occupation of Lithuania in June 1940, Alantas fled to Germany. His wife and son remained in Lithuania and were deported to Siberia during the June deportation in 1941. In Germany, he was invited to head the Commission of Culture of the Lithuanian Activist Front, a movement of Lithuanian exiles who sought to liberate Lithuania with Nazi German support. Alantas belonged to the radical right wing of the LAF and supported establishment of the Lithuanian National Socialist Party. Despite being offered by Pranas Germantas to head the Commission of Culture in the Ministry of Education in the Provisional Government of Lithuania, his appointment was blocked by the Party of Lithuanian Nationalists and he was appointed as the head of Vilnius Drama Theatre instead. During three years of work, Alantas wrote three plays, two of which were staged. In 1944, Alantas fled to Germany from the approaching Soviet army and became a displaced person in the aftermath of World War II. In 1949, Alantas moved to Detroit, United States, where he worked as a low-wage labourer in a Ford Motors automobile factory until retirement in 1968. He knew French and German, but struggled with English. He dedicated the rest of his life to literary work and published several novels, short stories, and a poetry collection. He was chairman of the Lithuanian Journalists Association in 1967–1971, and was offered jobs editing Lithuanian periodicals but he refused.
In exile, Alantas's views grew increasingly esoteric and are exemplified in his first novel Pragaro pošvaistės (Patches of Hell). Searching for a psychological refuge, he began glorifying Baltic paganism and pre-Christian Lithuanian culture and denounced Christianity as a foreign, imposed influence. He equated Lithuanian national ideology with a return towards pagan humanism, and championed a worldview in which Lithuanians would recognize only Praamžius, the chief god of Baltic paganism, in the metaphysical, humane solidarity between fellow Lithuanians in the moral, and the principle "kill your enemy if you're able, perish yourself if you're not" in the political prism. In emigration, Alantas published two non-fiction books. In 1976, he wrote a study on Romas Kalanta who self-immolated in Kaunas protesting the Soviet regime in 1972. He wrote Tauta istorijos vingiais (The Nation Along the Twists of History) in 1987 and published it in 1990. It contains thoughts on the survival of the small nation, national character and identity of Lithuanians, meaning and value of the anti-Soviet resistance by the Lithuanian partisans. The work was republished in independent Lithuania in 1992. That year, the Ministry of Culture and Education proposed to include the book in the history curriculum for the 12th grade, but the proposal was quickly dropped.
Vytautas Alantas