On American troops stationed in Britain during World War II:
Overpaid, overfed, oversexed, and over here.
Attributed.
Found in Dwight D. Eisenhower: A Gauge of Greatness (1969) without attribution: "The trouble with the Yanks is that they are overpaid, overfed, oversexed, and over here".
In POW odyssey: recollections of center compound, Stalag Luft III and the secret German peace mission in World War II (1984), the quotation is attributed to an anonymous British girl.