The Modern Warfare series is absolutely rife with war-related anvils, some of which are provided word-for-word by characters in-game, and it's scary how true most of them are:
"You have to trust someone to be betrayed."
"To know you're close to the end is a kind of freedom."
"History is written by the victor."
"History is filled with liars."
"It doesn't take the most powerful nations on Earth to create the next global conflict. Just the will of a single man."
"The bigger the lie, the more likely people will believe it, and when a nation cries for vengeance, the lie spreads like a wildfire. The fire builds, devouring everything in its path."
"All warfare is based on deception."
"Revenge is like a ghost. It takes over every man it touches. Its thirst cannot be quenched... until the last man standing has fallen."
"All you need to change the world is one good lie and a river of blood."
"Every man has his weakness."
"They say truth is the first casualty of war. But who defines what's true? Truth is just a matter of perspective. The duty of every soldier is to protect the innocent, and sometimes that means preserving the lie of good and evil, that war isn't just natural selection played out on a grand scale. The only truth I found is that the world we live in is a giant tinderbox. All it takes...is someone to light the match."
"There's a simplicity to war. Attacking is the only secret, but dare... and the world yields. How quickly they forget that all it takes to change the course of history... is the will of a single man."