dealing with cavalry

[phoenix]

Another novice question, no doubt. Sorry. But what are you meant to do about enemy cavalry when you have none yourself?  Defensive games are no problem - form squares in appropriate areas, try to get cannon up to reduce the cavalry, perhaps. At least, when I'm defending I've never noticed this problem. But what about where I'm attacking and have no cavalry, but the enemy does? How do I get them out of the way? Is there anything I can do with (attacking) infantry to deal with cavalry? 

Thanks,

Peter