Cavalry Squadrons??

[Liebchen]

does it make sense for me to charge an infantry unit, that is in fact larger in size than the Cavalry unit ?

This depends entirely upon the situation, but keep in mind the following:

a. Cavalry is always disrupted after a charge.
b. Where there is one infantry unit, there are likely others who might be able to isolate the disrupted cavalry unit.
c. Cavalry losses cost a lot in points.

So weigh your decisions accordingly.