Ender's Game
What is the secret of the Third Invasion?
Chapter 13-Valentine
Chapter 13-Valentine
The secret of the Third Invasion is the "humans" are the invasion. Graff and the other commanders aren't concerned with whether or not the Buggers are planning to attack or whether they'll ever attack again. They aren't going to give them a chance to attack..... thus, humans are the attackers, and the third invasion is a human attack.
Ender's Game