Turkeys biggest trial coup attempt involved nearly 500 suspects court

I think there may be some confusion here!

Turkeys, the birds, are not known for their ability to plan or execute coups. They are domesticated birds that are commonly raised for their meat and are not capable of complex political machinations.

It's possible that you may be thinking of a different entity, such as a country or organization, that has experienced a significant trial or coup attempt involving nearly 500 suspects in court.

If you could provide more context or clarify what you are referring to, I'd be happy to try and help you further!