Try and answer this riddle?

[Brandon]

If you order me to charge, I'll fall back.
If you order me to speak, I'll be silent.
When I'm ordered to retreat, I'll assault.

What am I?
None of the answers are correct

 

[Karbonclone]

yes , that sounds right, Jedediah........ so whats the riddle?

 

[Anonymonisa]

A Private in the Army, Marines, or maybe Airforce

 

[PeaaTearaGriffin]

A positron

 

[Jedediah]

A dog.

 

[MichaelMaddog]

A denizen of Bizarro World