The columbian exchange also traded slaves. A lot of them going into Brazil and into the Caribbean but not yet into the 13 British colonies. This was caused my the demand of raw materials like sugar and caused the increase of population growth in Europe as well as the development of the plantation system in America. Furthermore the columbian exchange as far as slave trade would lead to the plantation system and population increase because of a a high demand
Many areas were reused as checkpoints or training, but some were even used as tourism spots due to their history, and many of them were in good shape
No. If it has nothing to do with the lesson they're teaching, it would be unnecessary.