This acheivement can be obtained within the first level of the game "
Osaka Castle".
In the final section of the level you will be introduced to "
Takuma" using his marksman ability look at the left hand section of the level (Towards the gate) there will be two officers below a set of planks. Wait for the roaming guard to approach them as he does shoot the planks above and the achievement will pop.
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Video guide starts at 44 seconds*