34
There are 40 Generals Currently on Active Duty. This does not count the Generals that are in the National Guard and Reserve who have been activated or otherwise. http://en.wikipedia.org/wiki/List_of_active_duty_United_States_four-star_officers
Many
1 full general, 5 lieutenant generals and about 60 major generals
5
4 star generals are in the US
300
The US Army had over 1,100 Generals during WW2.
two hundred and fifty six
3
Marshell
There were approximately twelve four star generals in the US Army during 1945. However, due to damaged records and other mitigating factors, a precise count on the total number of generals, from one star up, is nearly impossible to come by at this time.
none