Here are some of the figures. The increasingly Romanized Air Force removed the page since 2006. I'll find new links and more info.
https://www.patrick.af.mil/deomi/Observances%20&%20Demographics/Additional%20Resources/Review%20of%20Data/Jewish%20Americans/rodj95.htmReview of Data on Jewish Americans
(United States Air Force--citations on the Web page)
World War II
A summary of the war record of Jewish-American participants in World War II
Total population of the United
States.............................................135,000,000
Total Jewish population of the United
States.................................................4,500,000
Total number in the Armed Forces of the
U.S..................................................13,000,000
Jews serving in the Armed Forces of the
U.S.......................................................550,000
Percentage of Jews in the total
population...............................................3.33%
Percentage of Jews in the Armed
Forces......................................................4.23%
Everyone knows that Jews served in the draft military of WWII, in fact 1 out of 3 Dentists and Doctors in the military were Jewish in WWII.
WWII with it’s massive draft where all branches drafted and the Army reached 97% draftees is definitely well known by everyone as having Jews well represented in it.