While serving as an assistant medic with the Village Guard (Slovene: Vaška straža), he was captured at Turjak Castle and taken to the prisons in Kočevje and then held at Stična Abbey,[7] from where he fled to Ljubljana and worked there as a co-editor of the book series Slovenčeva knjižnica (The Slovene Library).

After fleeing Slovenia twice (at the end of 1945 and in early 1946), he made his way to the United States through the Carinthian refugee camps in 1950, and he worked until 1976 at a factory in Cleveland producing drill bits.

[1][2][3] Mauser began to publish his first prose and poems in 1938 in the newspapers Dom in svet, Mentor, Mlada setev, and Vrtec, and after his exile mostly with the Hermagoras Society in Klagenfurt and Slovene Cultural Action in Buenos Aires, as well as in the domestic and expatriate press in the United States and Canada.

Mauser's best works are the novella Sin mrtvega (Son of the Dead) and the novel Ljudje pod bičem (People under the Scourge).

Along with the historical image of the time, they mainly show the moral and emotional upheavals that accompany the destinies of the characters in the story.