If you suspect them, you could demand they surrender and prepare to be boarded, and legally give them warning shot, and then shoot them if they don’t comply.
If the ship sailing under false colors began to shoot under another flag, that’s a War Crime.
and what if you started cannoning before they change flag
If you suspect them, you could demand they surrender and prepare to be boarded, and legally give them warning shot, and then shoot them if they don’t comply.
If the ship sailing under false colors began to shoot under another flag, that’s a War Crime.