April 4th, 1940 (THURSDAY)
UNITED KINGDOM:
Churchill leaves for Paris to attempt to get more French co-operation in mining Norwegian waters.NORWEGIAN CAMPAIGN:
Operation Wilfrid commences under the command of Vice-Admiral William "Jock" Whitworth, a veteran of World War 1. 16 submarines begin moving from the North Sea into the Skagerrak and the Kattegat.
U.S.A.: The motion picture "Dark Command" is released in the U.S. This western, directed by Raoul Walsh, starred Claire Trevor, John Wayne, Walter Pidegeon, Roy Rogers and George "Gabby" Hayes. The plot is about William Contrell (Walter Pidegeon), the Civil War era despot, who launches his terror raids after clashing with Marshall John Wayne. The film was nominated for two Academy Awards.