The Empror's Trap - Chapter 60: Ch - Sudden Events:

Time travel became a member of the Hakka family who beat the enemy. He is the twin brother of Yiermi, who is the odd one. He began to receive assassination training at the age of three, and began to perform missions at the age of six.

His hands were covered with blood, and his feet were full of bones. His legend began as a killer.

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This is an unremarkable hunter fanfic.

- Description from novelbuddy

The officer Zhou Ping'an, who had recently graduated, by chance obtained a Broken Mirror that could traverse the Different World.Since then, the sky had been the limit for the birds to soar, and the vast ocean a stage for the fish to leap…

Discovering that his wife was cheating on him with his superior, Jonathan Hayes was put on the combat list by his superior, a list that had already been concluded weeks ago.Wanting to survive from the war and come back to get his revenge on his wife and his superior, Jonathan was killed in the battlefield.Instead of going to heaven like every good man should, Jonathan woke up five years back in time, before his country was captured by the enemy, due to the help of his country's corrupt leaders. Jonathan knew his job immediately he realized what had happened to him. To liberate his country from getting captured again, and to get his revenge on his cheating wife and his superior.He had guessed correctly, but there was more to it. He not only went back in time, he woke up in a parallel world where magic was present. His job was not only to rescue his country from getting captured again, his job was to become the first warlord of the world. The first king of the whole world.[Congratulations, you have been rewarded with two unique skills from God]

…but it seems pretty doable.