The louisiana purchase of 1803a)was a major cause of the spanish-american war.
b. pushed the spanish below the rio grande in north america. eliminatec)resulted in increased conflict between the u. s. and france.
d. almost doubled the area of the u. s. and gave it control of the mississippi river.

operation overlord was the codename for the battle of normandy, the allied operation that launched the successful invasion of german-occupied western europe during world war ii. the operation was launched on 6 june 1944 with the normandy landings

answer; /// (c) i believe that the correct answer is; ///full faith and credit.