Antitrust lawyers at the Federal Trade Commission and the U.S. Department of Justice reviewed fewer mergers and challenged fewer deals in fiscal year 2013, according to the agencies’ annual merger review report released Wednesday.

But the numbers tell only part of the story. Although there weren’t as many matters, two of them were enormous: DOJ suits blocking the merger of US Airways and American Airlines and Anheuser-Busch InBev’s proposed acquisition of Grupo Modelo. The cases settled with substantial divestitures.