Answer:
Explanation:
Because Americans felt they were a better society and people than other groups of people (Mexicans/Native Americans) already living out West and somehow that justified them taking over the West. The Mexican government grew frustrated with them moving their illegally.
So we know when certain things in history took place. Its hard somtimes to remember/memorize all the dates, but timelines do help.
Hope this helps :D
Most of the worlds “imperial” countries were involved in the conflict.
