Had a knight to protect city but still caused “destruction” when barbarians arrive
This happened twice where I had activated my knight with one city present in my turn before the barbarians defeated Catan, but I still lost my city... we all had the same number/strength knights...
Screenshots on Google drive: https://drive.google.com/drive/folders/1-RjDGtsMg2bMHUmEyIVWbbz-4-lVUoY4
How many, and which, of the other knights on the board were activated? Did any other player lose their city?
Activating knights to protect your cities probably wasn't enough in this case.
My guess is that 1 knight from each player was activated for a total of 3 knights. There were 4 cities present, thus barbarian strength of 4.
When barbarians strength is higher than that of the players, then the lowest contributor(s) all lose a city to destruction. Since all 3 players were the lower contributor (1 knight each) all players lose a city to destruction.
This is why matted@ asked how many knights were active and whether the other players also lost cities. I think they are suspecting the same.
The number of cities owned by the players is not considered for the purposes of destruction.