Here's how I imagine Yang's reaction (with some inspiration taken from history and Admiral William "Bull" Halsey's famous post-Pearl Harbor quote)



"I thought you were my friend. I thought you believed in peace. I thought you would keep your promise, make Sienna, Adam, and the Emperor see reason. That you would help stop what was happening in China. The embargo on oil and steel was meant to stop this, to give you, your family and your peace faction ammo to use... To make the war hawks stop.



But then I wake up one Sunday morning to Pearl Harbor ablaze, more than two thousand of my countrymen dead, a day that lives in infamy... And I find out you planned all of it. Now... there is nothing between us but WAR, and I will PERSONALLY see to it that you will join your people, speaking your language, IN HELL."



Sorry if I got carried away, I love history and RWBY. This is one of the best pieces I've ever seen on this site.