They had the quad hemmed in, and the humans quickly retreated behind them, leaving her exposed.

The Martians envelop the planet in a smoke screen, and the humans retreat to the moon Deimos.

The humans stared at the star-strewn Universe and retreated in alarm.

All the humans had retreated to higher ground.

Snowball had planned for such an invasion and leads the animals to victory, causing the humans to retreat.

Rita and the last humans had retreated to Earth.

Was there an end to how often humans would retreat?

Remains of human habitation have been found from the prehistoric, Roman and Saxon eras, showing that humans retreated towards progressively higher ground over these periods.

By then, humans have retreated to underground living facilities, and, as a result of subjection to a specific kind of radiation, all males have died out.

"If fighting hopeless battles is good for humans, then why do humans sometimes retreat?"