Lefevre hurriedly advised, "Your Highness, if we are delayed near Brussels, even for just half a month, the Austrian and Prussian reinforcements will arrive. Additionally, England has recently landed 20,000 troops in Utrecht."
Utrecht is a province in central Netherlands, only 140 kilometers from Brussels.
Meanwhile, Gai'erden is an important stronghold for Prussia on the west bank of the Rhine River, with seventy to eighty thousand troops stationed there. From there to Brussels is just over 170 kilometers. Further away, there are even more Allied Forces troops.
If Brussels is attacked by the French Army, the Allied Forces might mobilize a large number of troops to crush France's Southern Netherlands Army.
At that point, the 20,000-plus troops here will certainly be unable to hold out.
Therefore, it is most consistent with the initial strategic deployment set by the General Staff to create a standoff with the enemy between Brussels and Wavre.