Watch Full Movie Online. Der 10. Mai (The Tenth of May) was the date in 1940 that Hitler invaded the Low Countries: Belgium, Holland and Luxembourg. Neutral Switzerland, which hadn't experienced a war since the 14th century, hurriedly fortified its borders with battalions of inexperienced soldiers. The panic, confusion and isolated acts of courage which occurred on that fateful day are re-created in this Swiss docudrama. The story is "personalized" by concentrating on a fugitive German soldier (Heinz Reincke) who falls in love with the Swiss girl (Linda Geiser) who shelters him. Produced on a bare-minimum budget, Der 10. Mai is impressive more for its sincerity and raw energy than for its actual cinematic merits.