The Southern colonies had two kinds of farmers: the large farms and plantation owners and the small farmers. The main crops planted in these colonies were tobacco, rice and indigo. These crops sold for cash and were usually exported. Producing these crops needed sizable manpower so these large farms and plantations depended on slaves to do the work for them.
The Mexican troops attacked Taylor's group because they mistook Zachary's intentions. (mexican troop believed zachary came to attack them) Hope this helps :)
