Check Your Six
This does not imply that you should examine your abs. This six is the numeral on a clock face, not a six-pack. Six is, of course, the lowest number on the dial, and six o’clock in a military context implies the rear. So “check your six” is a warning to keep an eye on your back, which is an important precaution on the battlefield.
Check Your Six
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Days And A Wake-Up
This does not imply that you should examine your abs. This six is the numeral on a clock face, not a six-pack. Six is, of course, the lowest number on the dial, and six o’clock in a military context implies the rear. So “check your six” is a warning to keep an eye on your back, which is an important precaution on the battlefield.
Days And A Wake Up
