Activity theory is a framework or a descriptive tool for a system. Consider the entire activity/work beyond just one actor or user. Accounts for environment, history of a person, culture, role of the artifact, complexity of real life action etc...
I’m not too sure. That’s a good question
The Unions strategy wa sto only give supplies and food to their soldiers at the fort, because they didn't want to start fighting in the country and start a civil war.