As explained above, the 1st, 2nd and 3rd Armies will initiate the campaign with the advance into Belgium.
The 1st Army had an uneventful advance to the north and west of Brussels-reaching its inital objectives.
The 2nd Army laid siege to Leige, but the fortress, although reduced, did not surrender. However, another large detachment of 2 corps from the 2nd Army succeeded in attacking Namur and Army reserves were able to exploit into Brussels-capturing the city.
The 3rd Army fought one small battle against the French on its advance through the Ardennes. Even though it did not reach Dinant as planned, it has gained some good ground.
The results of these initial battles are in the following reports-including a view or two of a detailed battle report which is accessible after each battle if desired.
The battle of Namur is a good place to start.