Side mission 1
Defend the farm from the incoming enemies. It's worth to call in recruits to help you, as the enemies will be high in numbers and the civilian can lose health.
Side mission 2
Beat the merchants to help the starving children. Just remember to use fists instead of hidden blades.
Side mission 3
Defend the family from eviction by defeating the guards.
The mission consists of killing the Templar leader hiding in the nearby camp. The new recruit skills - "Lure" - will help you in that. It can be used to lure out designated targets. That way you can draw guards away from their posts and safely sneak into a restricted zone.
This mission is best dealt with by just running into the camp and quickly killing the captain, without even trying to sneak. With the main target dead, the rest of the enemies will disappear.