Below that definition, there is a small, greyed-out box: "Related: Terrain Traits (Obscuring, Dense, Light Cover)."
You read aloud: "Players alternate selecting eligible units to fight, starting with the player whose turn is not taking place. Any units that have the 'Fights First' ability are considered eligible..." wahapedia core rules
You open Wahapedia on your phone. You type "Fight First" into the search bar (a feature that loads results as you type, faster than Google). It brings up the subheading: "Order of Combat." Below that definition, there is a small, greyed-out
"Wait," you say. "That unit behind him has a Fight First ability from a Stratagem." Below that definition