Answer:
1- The addition of Texas added to the happening to the Mexican-American War
2- The contention began, to a limited extent, over a contradiction about which waterway was Mexico's actual northern fringe: the Nueces or the Rio Grande
Explanation:
The fundamental driver of the war was the affirmation of Texas into the United States of America. Since Mexico didn't perceive Texas' freedom after their effective resistance to the Mexican government it was viewed as an intrusion into Mexican domain once Texas acknowledged the greeting into the United States.
Answer:
C.) The union took control of the Mississippi River.
Divides the powers into Branches - Separation of powers
Divides the power between central and state govern. - Federalism
Each Branch of govern. - Checks and Balances
Russia today or of antiquity?
Not:
Invasion of Poland
Nazi-Soviet Non-Agression Pact
Pearl Harbor
Munich Conference
The rest are all associated with WW1
hope this helps