It was quite a European war until 1917 when the Americans joined up. They don't have the same sense of the loss of innocence and the cataclysmic loss of life. A whole generation was wiped out.

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I think one of the coolest things about the job is the level of trust we have for each other. The actors fully trust that the writers will write amazing episodes and the writers trust that the actors will follow their instincts with the characters.