Between 1941 and 1945, British Hong Kong (then a colony) was occupied by the Japanese, see this Wikipedia article.
However on British Hong Kong's Wikidata page, there's no mention of the Japaneses occupation whatsoever. It seems like it was a British colony or dependent territory from 1841 to 1997.
I'm willing to contribute to Wikidata to fix this, but what's the best way to model this short-term occupation?