How is “fall back” used?

In Transformers (2007), one line is: “It's Megatron! Retreat! Move! Fall back!”

Which movie is “fall back” from?

The clip at the top of this page is from Transformers (2007).

to move or turn back

Heard in 32 movies

Oxford95% of films
to move or turn back
It's Megatron! Retreat! Move! Fall back!

Definitions from the Oxford Advanced Learner's Dictionary, 9th edition

It's Megatron! Retreat! Move! Fall back!

Said in 8 films · #1