Not much is known about Jewelry Bonney’s past yet, but we know that she fled from the government and became a pirate. When she was beaten and captured by Blackbeard, Akainu himself came to retrieve her. He then says “When I heard that you had fled from the government, a chill went down my spine. But that is all over now…” This indicates that they were afraid of something when they didn’t have Jewelry Bonney in custody. My theory on this is that The World Government had her in custody in order to keep Big Mom in check. And when she escaped they were afraid of either a Yonko war, or Big Mom attacking them.