 If you liked
Sentouin, Hakenshimasu!
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 ...then you might like
Kouchuugun Shikan, Boukensha ni Naru
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Both are isekais that feature a more advanced civilization visiting an underdeveloped planet (Nanomachines, teleportation, firearms, etc.).
Sentouin, Hakenshimasu! (Combatants Will Be Dispatched!) is about the comedic misadventures of an evil soldier from an evil company (kind of), while Kouchuu Gunshikan, Boukensha ni Naru (The Galactic Navy Officer Becomes an Adventurer) is about a space soldier trying to return to his empire.