Here's another story. A group of paratroopers were sent back during a mission. Their plane had mechanical problems. Once sent back, they were redeployed to a different theater of war. They had to quickly adapt to new strategies and fight alongside different units, which was a huge challenge but also an opportunity to learn new combat techniques.
There was a group of engineers sent back from a bridge - building mission that was aborted due to enemy attacks. Back at base, they designed new fortifications and anti - tank traps. Their innovative designs played a crucial role in defending their area from enemy armored units. They worked day and night, using their engineering knowledge and the experience from the failed mission to create effective defenses.
In such a fanfiction, one possible outcome could be a character using knowledge from WW2 to change the course of WW1. For example, they might introduce more advanced military tactics. Maybe they could try to prevent certain events that led to the large - scale destruction in WW1. However, this would also likely cause a lot of chaos as the timeline is disrupted.
A character's perspective would likely change a great deal. In WW2, they might have seen the full horror of total war, with aerial bombings and large - scale genocide. Going back to WW1, they would find a war that was more 'traditional' in some ways, with battles mainly on the ground. They might be shocked at the naivete of the soldiers in WW1 who were not fully aware of the new forms of warfare that would come in the future.
One great 'Percy sent back in time' fanfic is 'Back to the Beginning'. It shows Percy having to deal with all the early threats in a new way. Another is 'Time - Twisted Percy' which has an interesting take on how his knowledge of the future changes things. There's also 'Percy's Time - Travel Adventure' where he forms unexpected alliances in the past.
Fan Xian did not return the fake key. Instead, he made a fake key and put it back in its original place to avoid arousing the Empress Dowager's suspicion. Thus, Fan Xian did not send the fake key back.
The opening of The Myth, Sending Yi Xiaochuan Back to the Modern World, was a novel. The main character, Yi Xiaochuan, could return to the modern world through a Tiger-shaped Pendant. However, the specific plot and ending did not provide relevant information in the search results, so it was impossible to know if Yi Xiaochuan had successfully returned to the modern world.
Revan sent back in time might completely change the course of galactic history. He could influence key characters in the past. Maybe he'd train a young Jedi who would become a great hero earlier than in the original timeline. Or he could interfere with the Sith teachings, leading to a different breed of Sith or even weakening the Sith order as a whole.
One common theme is self - discovery. When Percy is sent back in time, he often has to re - evaluate who he is without all the experiences he had in his original timeline. Another theme is the butterfly effect. His actions in the past can have huge consequences for the future. For example, a small decision he makes might change the entire course of a battle.
Well, in this type of fanfiction, Naruto could change the relationships he had at the academy. He may befriend Sasuke earlier and in a different way, perhaps preventing Sasuke from being so cold towards him initially. Also, he could have more time to train with his classmates and help them improve too, which would make for a very different dynamic in the group.