The Incredible Hulk (1962) #134
In the distant 41st Century, Kang the Conqueror is furious that he still has not been able to defeat the Avengers and thereby take over the 20th Century. The time lord decides to take an alternative approach to defeating the Avengers: Changing history in such a way that the group is never formed. To this end, Kang decides to target the World War I hero the Phantom Eagle. In destroying the famed hero, history would take another course that would see to it that the Avengers were never formed. When Kang tries to travel back in time, his time machine gets caught in a time storm that prevents him from entering the year 1917. Kang then decides to try and select another pawn that might be able to break through the time storm.
Deciding to use the Hulk as his pawn, Kang transports him from the year 1971 to his own time and asks the Hulk’s aid. When the Hulk refuses at first, Kang offers the Hulk a means of destroying Bruce Banner once and for all. Kang shows the Hulk one of the Phantom Eagle’s missions where he destroyed a German cannon call The Boche that would have led to a key victory in the war and tells the Hulk to prevent this from happening. The Hulk, who believes that Banner is a separate being from himself, agrees to do it, just barely comprehending the nature of his task or that a German victory would lead to the death of his grandfather whom fought in the war, thereby erasing Banner and the Hulk — the key being that led to form the Avengers — from existence.
The Hulk is then sent through the time stream, and his neigh indestructible body is able to handle the the Time Storm and the Hulk ends up in the year 1917 right in the middle of a battle between opposing armies. When German soldiers attack him, the Hulk easily smashes them and begins his mission by beginning to track down the Phantom Eagle.
The Eagle himself is preparing his bomber run to stop the Bouche from being completed. When he takes to the air, the Phantom Eagle is spotted by the Hulk who manages to knock the explosive loaded drone plane free from the Phantom Eagle’s plane, causing it to miss it’s mark and explode harmlessly. The German army, witnessing this spectacle begin firing on both the Phantom Eagle and the Hulk. This in turn infuriates the Hulk who dives down at the army, and ends up destroying the Bouche himself.
With his mission a failure, the Hulk is confronted by an astonished Phantom Eagle, the energies of the Time Storm begin sending the Hulk back to his native time. Kang however tries to prevent this by using the power of his mind to keep the Hulk there. However, this fails to work and as the Hulk is transported back to the year 1971, Kang finds himself sucked into limbo for his troubles. THe Hulk reappears in his own time, unconscious he reverts back into Bruce Banner.