Lances can be an effective method of an anti-cavalry solution. They can be used by infantry and cavalry to provide extra reach for your units. When your troops charge in field mode, lances and spears may be "braced" by units which makes them more effective. This is only viable when using a two handed pole-arm. Spearmen are very effective when used in conjunction with archers in a "ranks" formation, as they can slow the assault of infantry and cavalry while your archers can fire.