Oqwert

Just changing it to "Resistant to engulfment" instead would probably be good enough.

There are many across Wikipedia, but this is a good collection of them https://en.wikipedia.org/wiki/Timeline_of_national_flags Among the inverted ones are the 1508 flag of Armenia, 1796 flag of Azerbaijan, 1536 flag...

Found some more https://en.wikipedia.org/wiki/Talk:Sino-Soviet_split#/media/File:Featured_article_star_-_cross.svg https://en.wikipedia.org/wiki/Timeline_of_national_flags#Asia (Iran, 1796) https://en.wikipedia.org/wiki/Talk:Timeline_of_national_flags#/media/File:Clipboard.svg https://en.wikipedia.org/wiki/Wikipedia:WikiProject_Wikipedia#Former_featured_articles (Icons of former featured article, featured lists, good articles, former good articles, "did you know?") https://en.wikipedia.org/wiki/Wikipedia:WikiProject_Wikipedia#Assessment_of_articles (Featured list and good article...