Worst I've ever gone without any sleep at all- 2 1/2 days
Some "sleep" (as in 5-10 minute max "catnaps") 4 1/2 days during Desert Storm- BTW, we were finally forced to stop for sleep when the pilots of our helicopter zonked out upon landing at a "CASH" field hospital- woke them both up and asked "which one of y'all landed"- neither one knew-thought the other guy had. Got a good 12 hrs sleep in, of all places, the examination table of the OB/GYN section (it was the only area not in use!)