Groo the Wanderer #13
Date: March, 1986
Publisher: Marvel Comics
Series: Groo the Wanderer
Groo discovers than an old friend is king and hopes to join his service as an important military leader! Groo's friend is not as confident about his abilities and instead sends him to the farthest outpost. Along the way Groo forces everyone to farm and eventually brings down their entire civilization.
Writer and Artist: Sergio Aragonés