This study compared the observed number of suicides among the U.S. Marine Corps personnel from 1990 to 1996 with the expected number based onrates for the employed general U.S. population. Overall, there were found to be fewer suicides in the U.S. Marine Corps than expected. Hispanic & other ethnic group males & female Marines had greater than expected numbers. Evidence for suicide clustering in time & space was equivocal. (29 refs)