My Navy ship of about 400 personnel pulled into Karachi. We were told not to drink the water and be careful what you eat.
Sailors were told to drink only canned products and not the local water. Being creative they did just that but put ice into their drinks to cool them down. After pulling out of Port 85% of the crew had diharea, stomach aches, and were barfing water and not being able to hold anygthing down after eating for about a week or more.
Two weeks out to see we saw the aircraft carrier Kitty Hawk and asked where they were going to for a port call and they stated
" KarachI". They were wondering why we were rolling on the decks laughing and pointing at them. !! : ) : ) Their ship had a complement of 4000 or more !!!