During the World War I, for his poem Soldier's Thoughts he was put under military and political court in Russia.

First, he was a member of the Association of Writers (ASPIS), which was headed by Mykola Zerov, and then "Lanka" (MARS), which included Hryhoriy Kosynka (Osmachka's closest friend), Borys Antonenko-Davydovych, Yevhen Pluzhnyk, Valerian Pidmohylny and Maria Halych.

[3] Historian Serhii Yefremov in History of Ukrainian Literature noted it for the depth of imagery, brilliant vernacular, and epic style of thought.

[5] It was printed in the midst of preparations for the trial against the Ukrainian intelligentsia - the Union for the Liberation of Ukraine when the ideological press clamped down on individual freedom of creativity.

The 1930s ideological persecutions known as the Executed Renaissance had already taken away the first close friends of the poet - Hryhoriy Kosynka, Dmytro Falkivskyi, and Valerian Pidmohylny.

A wave of denunciations in the form of literary and critical articles branded Osmachka as the "enemy of the people".

Escaping from repression, Osmachka made his way to Podillia, intending to cross the Polish border illegally.

[1] In Lviv, Osmachka published his fourth collection of poems, Contemporaries (1943), which marked a qualitatively new stage of his work.

In 1944, Osmachka wrote the story The Senior Boyaryn - the first lighthearted book, after the previous scary images of cruel life.

Together with Ulas Samchuk Osmachka participated in the development of a new emigrant literary organization MUR (Ukrainian Art Movement).

In emigration, Osmachka's talent was revealed with new strength in his three prose works: The Senior Boyaryn (1946), Plan to the Yard (1951), and Rotunda of Soul Killers (1956).

Osmachka moved from Germany to the USA, lived for some time in Canada, visited France, and traveled through Yugoslavia.