Guild Battlegrounds

What is the Guild Battlegrounds? How can I unlock the Guild Battlegrounds? How many participants can we have in a Battleground map? What is Attrition? What are Province Buildings and which benefits do they bring? Which treasury goods will be asked to raise province buildings? Guild Battlegrounds: What Rewards Can I Win? Why was my guild positioned in this League and how can we advance? My guild finished a battleground in first place, and we didn't move to the next league! Why? Why do we have gold and platinum guilds in the same Battleground? Why some province buildings are so expensive? Why is this getting so hard to conquer a province? Why inactive guilds are gaining rewards as well? What happens when a Guild is disbanded? If I move to the next Age while a Battleground is running, which goods and units will be demanded? Why the difference in rewards is so close between first and last places? My guild participated in a battleground but we were marked as inactive, why? Guild Battlegrounds Update 2021: What Is New With The Update? Guild Battlegrounds Update 2021: How Can I Play The New Map? Guild Battlegrounds Update 2021: Will The New Rewards Replace The Statue Of Honor and Road To Victory? Guild Battlegrounds Update 2021: Why is no one displayed as 'Intruder' in the logs, when there were some fights on a marked sector?