in 1944 , major general leslie r. groves , jr. , director of the manhattan project , sent Sending major arthur v. peterson to brief general dwight d. eisenhower and his senior staff officers at the supreme headquarters allied expeditionary force ( shaef ) .

from 1932 to 1968 , the democratic party was the majority party as during that time period the democrats had won seven out of nine presidential elections Choosing and their agenda gravely affected Influence that undertaken Action by the republican dwight d. eisenhower administration , but the election Choosing of 1968 reversed Change the situation completely .

general dwight d. eisenhower was appointed commander of supreme headquarters allied expeditionary force ( shaef ) , and general bernard montgomery was named Name_conferral as commander of the 21st army group , which comprised Cause_to_be_included all the land forces involved in the invasion .