a policy of imperialist expansion said to be inevitable
Magazine and Democratic Review, declares that the United States has a "manifest destiny" to occupy the North American continent. i put in this new text.
after disputes over Texas lands that were settled by Mexicans the United States declared war on Mexico in 1846 and by treaty in 1848 took Texas and California and Arizona and New Mexico and Nevada and Utah and part of Colorado and paid Mexico $15,000,000
July 23: Henry David Thoreau, living in a cabin at Walden Pond, near Concord, Mass., was arrested for refusing to pay a $1 poll tax, his protest against slavery and the Mexican War.
1846 January: President James K. Polk orders Gen. Zachary Taylor to march southward from Corpus Christi and occupy position near the Rio Grande River, 150 miles south of the Texas border as defined by the Spanish and Mexican authorities.
This incident that inspired him to write the essay Civil Disobedience, in which he argued in behalf of non-violent protest against unjust government policies.