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.
At base, there is an ethical justification for the dropping of the bomb on Hiroshima as the United States was ready to mount a full scale invasion of Japan from China.
However, the Japanese were not given adequate time to surrender and so the dropping of the bomb on Nagasaki was inexcusable.
<span>a white American of non-Hispanic descent, asdistinguished especially from an American ofMexican or Spanish descent.</span>2.(<span>sometimes lowercase</span><span>) an English-speakingperson in a place where English is not thelanguage of the <span>majority.</span></span>