At last I got it!! The first opus of three telling the detailed history of the France invasion on May 1940 following Panzern units diaries, French army documents and testimonials. The whole 3 tomes representing more than 900 pages of highly illustrated content. Le Corridor des Panzers - Uber die Maas (Panzers' corridor - Beyond the Meuse) Tome I of 3, Heimdal Publishing, Author: Jean-Yves Mary. This first tome goes from May 1940 10th to 15th, 460 pages.