WW1 was the first war to abandon the line styles of "Noble Fighting" found in contemporary Europe. In the old style soldiers walked in line and proceed to shoot each other till the other fled or simply all died. In the horrific new war trenches were dug and six machine gunners could hold off and assault of thousands of contemporary linemen. Doing so led to the horror of trench war which was bloody much more violent and dark.
1.True
"Rival Land Claims. <em><u>England</u></em>, France, and the Netherlands became <u><em>early rivals of Spain</em></u> in colonizing the <u><em>North American</em></u> continent," as stated by https://www.loc.gov/teachers/classroommaterials/connections/parallel-histories-spain/history3.html, which means that england was in fact the first biggest rival in the North American continent.
2.False
"The Treaty of Paris of 1763 ended the French and Indian War/Seven Years' War between Great Britain and France, as well as their respective allies. In the terms of the treaty, <em><u>France gave up all its territories</u></em> in mainland North America, effectively ending any foreign military threat to the British colonies there," as stated by https://history.state.gov/milestones/1750-1775/treaty-of-paris, meaning <em><u>not just one</u></em><em> </em>colony, but all colonies.
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The transcontinental railroad transformed the west because it made the idea of manifest destiny so much easier to achieve. The railroads also gave access to many trade spots, which in result connected them all, making the economy of America BOOM.
A!!!!!!!! hope this helps!!!