Conversation so far:
What happened to Osceola in the 1830s?
In 1836, Osceola led a small group of warriors in the Seminole resistance during the Second Seminole War, when the United States tried to remove the tribe from their lands.
Did Osceola sign the Treaty of Payne's Landing?
No. According to legend, Osceola stabbed the treaty with his knife, although there are no contemporary reports of this.
How did certain chiefs refusal of the Treaty of Payne's Landing go over?
In retaliation, the US Indian agent, Wiley Thompson, declared that those chiefs were deposed from their positions.
What happened after certain chiefs refused to abide by the Treaty of Payne's Landing?
Wiley Thompson also forbade the sale of guns and ammunition to them.

Question: What was he complaining about?
Self-contained rewrite: What was Osceola complaining about?