Alien Arms Empire.

As the king of the Arms Empire, Tang Mo fell unexpectedly, traveled to a completely different world, and unexpectedly obtained a King of Arms system.
In this backward world, Tang Mo relies on the abilities given him by the system to promote the development of the entire world.
After all, civilization's desire to conquer is its driving force, and life has been constantly evolving between attack and defense for thousands of years...
So, selling assault rifles to these archers, training knights to be tankers... no problem, right?

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