Mount & Blade II: Bannerlord · Ranged combat skill
Crossbow
Crossbow covers operating and maintaining crossbows. The supplied description distinguishes it from Bow and says the skill develops by shooting enemies with a crossbow.
How it works
Use a crossbow against enemies to gain Crossbow skill. Focus points speed skill progression. The separate troop guide describes Vlandian Sharpshooters at tier five as having superior crossbow range and good one-handed weapon and shield capability; this is a troop description, not a character-skill effect.
Your next step
Practice with a crossbow if that is your preferred ranged weapon.
Read the supporting references
Skills | Mount and Blade 2 Bannerlord Making Money in Mount And Blade 2 Bannerlord: Getting Started Guide Part 2
Check the edition and source version for patch-specific details. Guide methodology.