In a tweet yesterday (please forgive its – Norwegian – language) I put it to my fellow tweeters that the longer an occupying force (Spain) is able to hold an occupied possession (Catalonia, since 1714), the bigger the chance of the occupation’s international approval:

Most of those protesting the statement objected that the occupation has lasted too long for the assertion to hold true.

Also see: Let Catalonia remain occupied, if they so desire