Without going into a needlessly long post those prophecies have to do with pagan rome and the Roman Catholic church.

The dragon (which was a common symbol of Rome) was wounded upon pagan romes death and was "healed" with the rise of the Roman Catholic church which assumed all the powers of the former pagan empire.

The 42 months are not a literally 42 months. In the book of Daniel God gives him "a day for a year". That would 1260 days or 1260 years. The roman Catholic Church ruled and reign for 1260 years before Napoleon (also mentioned in revelation) put a stop to it. During this 1260 years it persecuted the saints by killing those who disagreed with it and spoke blasphemies including stuff like the Pope claiming to be all but equal to God.

Revelation and Daniel are sister books and they are all fulfilled aside from the 7th vial being poured which is where we will see the Babylonian system we are in come to an end. Financially, religiously, politically. Etc.