General Genghis Kahn Schmitz is a character in I Had Trouble in Getting to Solla Sollew. He 

General Genghis Kahn Schmitz

takes the Solla Sollew Traveler to be a "Private, First Class" in his army and defeat the "Perilous Poozer of Pomepelmoose Pass". He also appears in Seussical the Musical, his role is changed completely. There, he is more similar to the Yooks in The Butter Battle Book, as is having a war for those who eat bread butter side up.