Explain three things that led to the war between Mexico and the U. S.

Explanation:

1) Territory (land) disputes. 2) Texas Annexation- Texas was admitted to the Union as a slave state nine years after winning its independence from Mexico. ... 1) Treaty of Guadalupe Hidalgo- Mexico gave up California and New Mexico. 2) Gadsden Purchase- gave us final territory of the current continental United States.

the labor movement in the united states grew out of the need to protect the common interest of workers

for those in the industrial sector organized labor unions fought for better wages reasonable hours and safer working conditions

  in the 19th century trade unionism was mainly a movement of skilled workers.

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