Old Bob, thanks for your attempt :
Mais surtout, l’armée allemande a perdu 2.000 hommes tous les jours
but overall, the German army lost 2000 men all those days
you made an error “tous les jours” means : each day, it’s not “tous ces jours”
Les Allemands ne croyaient faire qu’une bouchée des Français, mais ils sont très surpris en perdant dans cette seule journée du 18 juin plus de 2000 tués. Il y a environ mille morts du côté français.
The Germans did not believe it was only a handful of Frenchmen, but they are very surprised, losing in this single day of 18 June more than 2000 dead
idem
The Germans believed they could eat the french soldier in one mouthful, but they are very surprised that during this alone 18 of june day 2000 of them died, while about 1000 french soldiers died too
