How does Oblivion tie into Skyrim?

How does Oblivion tie into Skyrim? (Conveniently, Tamriel’s fourth age started when the Oblivion Crisis ended, so years in Skyrim are counted from the end of the Oblivion. If a history book says something happened in 4E33, that’s about 167 years before Skyrim’s present day.) Over these two centuries, the Empire has started to crumble.

(Conveniently, Tamriel’s fourth age started when the Oblivion Crisis ended, so years in Skyrim are counted from the end of the Oblivion. If a history book says something happened in 4E33, that’s about 167 years before Skyrim’s present day.) Over these two centuries, the Empire has started to crumble.