Sometime after joining the military, Mustang had paid a visit to his sick teacher. Back then, Mustang believed that strengthening the military was needed and that alchemy in particular could help protect the people. He had also urged his teacher to become a state alchemist to get out of poverty and to continue with his research, but Mustang's teacher felt that his research on the strongest alchemy had been completed long ago. He had conjectured that alchemists cannot help but seek the truth and that they die when they stop thinking, and he considered himself dead. Mustang's teacher had actually died shortly thereafter, leaving his daughter who had all of his research in Mustang's care, and that daughter was none other than Hawkeye. After the burial, Mustang had told Hawkeye that, as a soldier, he might one day die like garbage on the roadside, but he still wanted to protect everyone and become part of the foundation of the country. Hawkeye had thought that this was admirable and wanted to believe in a future where everyone could live happily, and she had entrusted him with her father's dream.
Back in the present, Ed pays a visit to Hawkeye and returns her gun. He tells her about his own inability to shoot and about what happened between Scar and Winry, and Hawkeye apologizes because she realizes that the gun became a heavy burden. This leads to the two talking about what happened during the Ishbal conflict, and Hawkeye tells of how it started, how the Fuhrer had ordered the beginning of the Ishbal extermination, and all the killing that resulted. She herself had been a sniper, and she had been reunited with Mustang on the battlefield. Back then, she had questioned why soldiers who should be protecting the people were killing them instead, and the answer didn't come from Mustang but rather from Kimblee who had overheard. Kimblee's answer was that it's their job, and he had suggested that even Hawkeye had felt some sense of accomplishment in her own sniping skills. He had gone on to assert that they shouldn't turn their eyes away from death and to not forget since the enemy wouldn't forget either.
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