Assassin's Creed III: WARNING Use only your fists

Warning: Use only your fists is a warning message you get before possible desynchronization in Assassin's Creed 3

If you attempt to use a lethal weapon when the mission calls you to use your fists, you might see the message:

"WARNING: Use only your fists."

This means you are in danger of being Desynchronized

What to do

Immediately unequip your current weapon and switch to using fists.

otherwise, Desynchronization will occur.