To begin with, the League of Nations did have good intentions to begin with and to say that it was a complete failure would be egoistic in nature. The League had reduced much pain and sorrow after the events of World War I.
The Annexation of Texas, the Mexican-American War, and the Treaty of Guadalupe-Hidalgo, 1845â1848. During his tenure, U.S. President James K. Polk oversaw the greatest territorial expansion of the United States to date.
John Slidell. Prior to the Mexican American war president Polk sent John Slidell to Mexico to negotiate an agreement between that the Rio Grande River would be the southern border of Texas. Instructed to offer 30 million for California. Mexico denied Slidell's mission and war was declared on May 13 1846.