In General Wheelers own words, "this terrible catastrophe [sinking of the Maine] though not the cause of the outbreak of hostilities, certainly hastened the action of Congress in its declaration of war against Spain." According to Wheeler the Spains actions in Cuba were already leading to war between Spain and the US. The sinking of the Maine was the final straw that decided the congress to vote for war. But war would have come without the sinking of the Maine.
Wilbert Awdry Christopher Awdry and Britt Allcroft
<span>The nation's largest railroad center was found in Chicago. Chicago is considered as the most important center of railroads in North America. Chicago has been the most significant interchange point of commercial transportation between the nation’s great railroads.</span>
D settle in one place, they could then properly sustain themselves :)