I know, there is a limit of how many battle report you can have (I really would like that limit to be much higher). Fortunately there is a setting icon to choose, which reports I want. I changed it so I dont receive reports with my unit losses less than 1 %. Usually it works, but not with fortresses. Just an hr ago I received more than 10 attacks of just 1 pike at our league fortress and I get a report of all of them although I didnt loose any unit. Please fix that, I dont want my battle reports be full of 13 pages 1 pike filed attempts when I specifically changed my settings to avoid such scenario.

Just for fortress. It works with castles though.

Hello, Lord!

If you mean the Grand Marshal reports, then you can filter the reports about battles in Castles and Beacons. The filter does not affect the reports of Fortress battles.