How did Roosevelt change America's stance toward big business ?

Roosevelt earned a reputation as a "trust buster" through his regulatory reforms and antitrust prosecutions. His "Square Deal" included regulation of railroad rates and pure foods and drugs; he saw it as a fair deal for both the average citizen and the businessmen.

battle of saint-mihiel, (12–16 september 1918), allied victory and the first u.s.-led offensive in world war i. the allied attack against the saint-mihiel salient provided the americans with an opportunity to use their forces on the western front en masse.

explanation:

the name of the theory is landmass theory.