Why was the entry of the united states into world war i significant?

What enabled the drastic increase in us troop development to vietnam between 1964 and 1965?

Which source would best a historian understand the effect of the great chicago fire on families? a. a biography of a chicago family displaced by the fire b. a letter from a grandmother in new york to her family in chicago c. a newspaper editorial about families who were displaced d. an oral history dictated by an adolescent who fled the fire

Virginia has 11 people in the house and 2 in the senate. how many electoral votes foes it have? where is this addressed?