Quote Originally Posted by ichi
Grab some good mercenary cav and use them on the flanks. Depending on what units are getting around your flanks the alternative is to setup with a unit of SAPs (for cav flank) or FMAA (for inf flank) on each flank, just behind the main line. Turn them to face out and put them on Hold Form, dont commit them to the main fight save them for the expected flank.

ichi
For some reason when I tried a custom match to see how good the swiss could take an all Mongol Heavy Horse army. I had all Swiss Armoured Pikemen. I named It "Horse Slaughter". I thought Pikemen could destroy horses. The horses slaughtered me.