Critics charge that the government investigation is a politically motivated 'fishing expedition'.
The (members of the) 'expedition' discovered an ancient burial site.
organize/mount/launch a mountain-climbing 'expedition'
(..) because Rhaegar chose your aunt. And then he kidnapped her and raped her. We need friends in Westeros, and we need ships. I hope you're right about this expedition of yours. If I don't return, you'll know I was wrong. Our fathers were evil men. They left the world worse than they found it. (..)2016 TvShow: Game of Thrones Title: The Winds of Winter Season: 6 Episode 10