I thought you might be interested in looking at Trigger activated when one or more of buildings of certain type are destroyed.
https://forums.bohemia.net/forums/topic/197748-trigger-activated-when-one-or-more-of-buildings-of-certain-type-are-destroyed/?do=findComment&comment=3117604
× Pasted as rich text. Restore formatting
Only 75 emoji are allowed.
× Your link has been automatically embedded. Display as a link instead
× Your previous content has been restored. Clear editor
× You cannot paste images directly. Upload or insert images from URL.