After attending the Lycées of Diekirch and Luxembourg City, Borschette studied in Aix-en-Provence, Innsbruck, Munich and Paris.

In World War II he was forcibly enrolled in the Wehrmacht and fought on the Eastern Front.

His experiences there formed the basis for his literary work: almost all of his books involve the Soviet Union or the war.

[1] His work in and for Europe was aimed at making another war on the continent impossible (one of his books mentions the "génération sacrifiée", or the lost generation).

[2] From 1970 to 1976 he was a member of the European Commission with responsibility for competition, under the presidencies of Franco Maria Malfatti, Sicco Mansholt and François-Xavier Ortoli.