I think the mexican war where we took land from the mexico or the illiouisiana purchase
South american civilization:
- The invention of various type of plants that could be used for medicinal purposes.
- The invention of various tools that could be used for artworks
Meso American civilization:
- The invention of early agricultural land structuring for irrigation system
- The invention of earliest calendar to distinguish time/period
North American civilization:
- Popularized the use of tobacco (now it become the most used drug in the world)
- Invent several techniques to raise animals.
900-500=400
40-80=-40
7-6=1
947-586 =361
400-40+1=361
