Guild Wars Matchmaking takes into account two factors: your Guild’s Tier, and the number of participants in the battle from your guild.
 
Here's a breakdown:
 
1. Matchmaking will prioritize finding you a match against an opponent who has a similar VP rating and has the same number of participants.
2. If a guild with the same number of participants isn’t found in your tier, the search will be expanded to look for an opponent in 1 tier below/above.
3. If the matchmaking still fails to find you an opponent, your guild will receive a match against an AI opponent.

Note: You can face the same opponent only once per war.
 
As your Guild plays Guild Wars and accumulates Victory Points, the guild’s Tier will increase. This means your Guild will likely be matched against another Guild of the same Tier in your future Battles. Battles between Guilds that both have a high Tier can be very tense!
 
If you have question regarding mission difficulty, you can find more information in our "Sectors and Mission Difficulty" FAQ.
 
Gear up and get ready for battles!