Answer:
Speak softly and carry a big stick.
Step-by-step explanation:
It is a proverbial saying advising the tactic of caution and non-aggression but having as back up the ability to carry out violent actions if it is required.
Teddy Roosevelt is granted of the widespread of this saying. It is a great resume of the Big Stick Ideology carried out during his presidency. The idea of it is to first negotiate peacefully, but having strength enough in case if the negotiations went wrong.
I hope this answer helps you.