Saving 80,000 Gold in Another World for My Retirement 10 (Manga)

Is pillaging the reason for your visit? Then I suppose it's time to trample all over you! Three unfamiliar wooden ships appear at sea near Mitsuha's territory! A number of cannons are on board these large sailing vessels, the likes of which have never before been developed on this continent. If this world is experiencing an "age of discovery" like Earth did, then perhaps these ships are here to pillage and colonize!! Recognizing the emergency, Mitsuha contacts the Royal City and receives permission from the King to handle the situation as she sees fit. After dawn breaks, a small boat carrying officers and soldiers from the fleet lands—!

Volume 10 of the Saving 80,000 Gold in Another World for My Retirement manga series by Keisuke Motoe.