Using Warfare is similar in the application of using Investigation on your surroundings, except Warfare is focused specifically on a creature.
While you are able to use your action to make Wisdom (Warfare) checks like any other skill,
All players can choose to make one free Martial skill check at the start of each of their turns when in combat.
The results will vary, but things you might deduce about a creature include:
- Their power relative to you
- Traits they possess