Those German tanks up there-- the Doughboys flattening before them-- this is World War 1! The passageway in the cave must be a warp in time-- taking us back to the first World War! 
G.I. Combat #121 is an issue of the series G.I. Combat (Volume 1) with a cover date of December, 1966. It was published on October 11, 1966.
Synopsis for Haunted Tank: "Battle of Two Wars!"
Appearing in Haunted Tank: "Battle of Two Wars!"
Featured Characters:
Supporting Characters:
- General J.E.B. Stuart (As a spirit)
Antagonists:
- German pilot
- German Artillery soldiers
- World War 1 German infantrymen
Other Characters:
- Sgt. John Michael "Mike" Rock
- World War 1 American Doughboys
Locations:
Concepts:
Items:
- MG 42 Machine gun
Vehicles:
- The Haunted Tank
- German Panzerkampfwagen IV tank
- German Junkers Ju 87 ground-attack aircraft
- British-made Mark IV Male German tank
Synopsis for Gunner & Sarge: "A Salute for Sarge"
This story is reprinted from Our Fighting Forces #48.
Appearing in Gunner & Sarge: "A Salute for Sarge"
Featured Characters:
Antagonists:
Other Characters:
Trivia
- In the first story "Battle of Two Wars!", the soldier that Lt. Jeb meets on the other side of the cave is identified as Sgt. Mike Rock, the father of Sgt. Frank Rock.
See Also
Links and References
Look at how sad this is making Batman. You did this.