[m1911]

From www.naval-history.net:

10 May Germany invades Belgium
13 May Germans enter France at Sedan trapping armies in Belgium
17 May Germans enter Brussels
20 May Germans reach English Channel
26 May Germans take Boulogne and Calais
26 May - 4 June Dunkirk evacuation
5 June "Battle for France" begins
14 June Germans enter Paris
17 June Marshal Petain requests armistice terms
22 June France capitulates


So one of the most famed offenses (and military defeats) of the last century took 16 days to take Belgium, counting to the beginning of the evacuation of Dunkirk. It took another 9 days against almost no resistance to take Paris.

I guess around 17 May the journalists would have been talking about how the Germans were failing and the battle plan was all wrong etc.

[xm177e2]

Of course, Hitler never promised Belgium would fall in three days.