Could you explain what it is exactly you're talking about? How does decolonisation parallel to Catholic prophecy? 

One example among many is from the Fatima Crusader
The following dialogue was originally published in German in the October 1981 issue of Stimme des Glaubens. It is given as a verbatim report of the meeting between His Holiness John Paul II and a restricted group of German Catholics at Fulda during his visit to Germany. In the preface to the article it says “We know the name of the reporter and also that the docuмent is authentic.” This translation was made by Rev. M. Crowdy for Approaches magazine edited by Mr. Hamish Fraser of Scotland. It was translated from the Italian magazine published in Rome by Father Francis Putti. Both magazines are worthy of our trust. The report follows.

---

Question: What about the third secret of Fatima? Should it not have already been published by 1960?
Reply: (Holy Father): Given the seriousness of the contents, my predecessors in the Petrine office diplomatically preferred to postpone publication so as not to encourage the world power of Communism to make certain moves.
The Holy Father continued: ‘ON THE OTHER HAND, IT SHOULD BE SUFFICIENT FOR ALL CHRISTIANS TO KNOW THIS: IF THERE IS A MESSAGE IN WHICH IT IS WRITTEN THAT THE OCEANS WILL FLOOD WHOLE AREAS OF THE EARTH, AND THAT FROM ONE MOMENT TO THE NEXT MILLIONS OF PEOPLE WILL PERISH, TRULY THE PUBLICATION OF SUCH A MESSAGE IS NO LONGER SOMETHING TO BE SO MUCH DESIRED.’

Another is St. Hildegard:
"Before the Comet comes, many nations, the good excepted, will be scoured with want and famine. The great nation (America) in the ocean that is inhabited by people of different tribes and descent by an earthquake, storm and tidal waves will be devastated. It will be divided, and in great part submerged. That nation will also have many misfortunes at sea, and lose its colonies in the east through a Tiger and a Lion.

America has only ever had one colony.

Check out the list here:
Index of Possessions and colonies
http://worldstatesmen.org/COLONIES.html#US

[font=Helvetica, Arial,
                            sans-serif][size=+1]United States[/b][/font][/font][/size]