What are two important long-term strategies developed by the north to win the civil war?

Historians are concerned with the accuracy of their writings and readings but are also aware of the inability of authors to know every angle of every story biases, perspectives, beliefs, and a variety of other differences history being told by one person at a time no one being totally accurate, as hard as we try really need on this, and you^^

Persons or group opposing or hostile to another person or group the definition word is

Who was a 1920s film star who was the first male "heart throb" in film.