It was the British and Russian empires.
Answer:
San Francisco Bay and California ports
Explanation:
The conflict between the United States and Mexico began after the Westward Expansion when American settlers began to settle in Texas, which was part of Mexico. The tension started to arise and brought into conflict when Mexican President Antonio Lopez de Santa Anna is forced to signs a treaty in 1836 by the American government.
United president James K. Polk ordered American naval commander John D. Sloat to seize San Francisco Bay and California's coastal towns in case of war with Mexico. The war did begin and came to be known as the Mexican-American War.
Answer:
The most common positive affect was the intoduction to new crops the most common negative affect was the exchanges of diseases from old to new world
Explanation:
1955-1975 is how long it lasted.
