Stephen K. Bannon has come full circle.

Following his ouster from the White House on Friday, he will return to managing the right-wing media outlet Breitbart News — just as he was doing before he joined the campaign last year and then the staff of the West Wing.

There has been no shortage of news generated by the President Trump’s former chief strategist, a man who told the media to “keep its mouth shut,” seemed obsessed with dismantling what he called “the administrative state” and espoused a provocative theory of history, as laid out in a book that warned, “Winter is coming.”

Here is a guide to The New York Times’s coverage of the right-wing agitator who worked for Mr. Trump for one year and a day.

Building up the base

In the years before joining Mr. Trump’s campaign, Mr. Bannon was known as a hard-charging, obscenity-hurling manager at Breitbart News, where he became executive chairman in 2012. His stewardship was a success, turning the once-fringe media outlet into a force to be reckoned with.