Hmm, there were several triggering events that promoted westward expansion of the United States. Victory in war over Mexico (1848) gave the US new lands in the west. A treaty with Britain (also in 1848) gave the US sole possession of some formerly disputed Oregon territory lands also. Plus, in 1848, gold was discovered in California (land newly in US possession after that Mexican war treaty), so that prodded westward expansion too. Perhaps those are the initial "turning points" you're looking for. The completion of the Transcontinental Railroad in 1869 sure helped the process as it was underway, as well.
One of the outcomes was hitler losing its territory and to pay reparations to its allies. Germany and Berlin was divided into four parts (America, British, and the French on the west side while in the east side it was taken by the Soviet Union
¿El crucigrama de Islammico? (Lo siento, no hablo español jaja!)
The correct answer would be B. Carrying on the dream of Martin Luther King Jr.
One main reason why John C Breckenridge supported the purchase of the Louisiana territory was because he thought it would held end the issue of slavery, by leaving it up to "popular sovereignty" in the new territory.