I think it is the Northern and Southern unions.
Answer:
<em>James–Lange theory
</em>
Explanation:
The emotion theory of James Lange specifies <em>that emotion is equal to the range of physiological excitement caused by natural occurrences.</em>
Scientists William James and Carl Lange suggested that he / she should first experience body responses like increased respiration, increased heart rate, or sweaty hands in order for someone to feel emotion.
After this physiological reaction is identified, the person can say that the emotion is felt by him / her.
1. Second Continental Congress
2. Army at Valley Forge
3. Shays Rebellion
4. US constitution ratification
5. Louisiana Purchase
Hope this helps!
