[PhilDragoo]

1991

JAN 16: U.S. troop strength update: 425,000 in region; 60,000 Navy, 75,000 Marines.

U.S. Navy ship strength update: 108 total; 34 Arabian Gulf; 35 North Arabian Sea/Gulf of Oman; 26 Red Sea; 13 Eastern Mediterranean.

To date, 19 countries have deployed ground forces and 14 nations are participating in naval efforts.

[BushMeister]

The final Mid-Feb 1991 figure for U.S. personnel in the Gulf I'm finding is 540,000. Some 205,000 allied troops were also in theater.

That 540,000 figure is almost exactly equal to the U.S. peak troop deployment in Vietnam.