I'm not sure specifically as I haven't read this particular fanfic. But generally, it might involve the UNSC (United Nations Space Command) in the Halo universe using the Halo installations in a strategic way to bring an end to a war. Maybe they find a way to activate or control the Halo rings without causing the total destruction they are known for.
Since I haven't read the fanfic, it's hard to say for sure. But likely, there would be UNSC soldiers or commanders. Maybe the Master Chief could be one of the main characters as he is a very important figure in the Halo universe and often involved in major events related to the UNSC.
One idea could be to have Spartans from the UNSC interact with Halo's Forerunner technology in unexpected ways. Maybe they find a Forerunner device that gives them new abilities or reveals secrets about the Halo rings.
Master Chief is often a main character. Since he's such an iconic figure in the Halo universe, in fanfiction about the UNSC becoming powerful, he usually plays a crucial role in leading the way. He might be the one to first test out new powerful weapons or technologies.
Well, in some 'halo unsc becomes powerful fanfiction', there might be a plotline where the UNSC teams up with an alien race that they previously thought was an enemy. This alliance could be the key to their newfound power. They could share technology and knowledge, which leads to the UNSC becoming a more formidable force in the galaxy. Maybe they learn how to build ships with faster - than - light travel that are also more durable and better armed.
First, do your research on both Halo and UNSC lore. Know the different characters, technologies, and settings. Then, come up with a unique concept for the crossover, like what I mentioned before. After that, start with a strong opening that grabs the reader's attention, perhaps with an action - packed scene or a mysterious discovery.
In fanfic, it could be explored through different character perspectives. Some characters might be in favor of it as a last - ditch effort to end the war, while others would be vehemently against it due to the moral implications. Writers might also explore the technical aspects of firing the Halos, like how the UNSC manages to gain control over them and what kind of safeguards they bypass or ignore.
If the Halo UNSC fires the Halos to end the war in fanfic, it's a very complex situation. First of all, the Halos' power is immense. They would cause widespread destruction across the galaxy. But from the UNSC's perspective, they might think that by doing this, they can end the war quickly. However, there are so many unknowns. For example, how would the other races react if they knew the UNSC was about to fire the Halos? And what kind of new power dynamics would emerge after the Halos are fired? It could potentially create a power vacuum or even new conflicts in the long run.
A really cool aspect in such fanfiction could be the character interactions. Picture Master Chief meeting Luke Skywalker. They come from such different backgrounds but both are heroes in their own right. Master Chief is a super - soldier trained in combat, while Luke is a Jedi with a connection to the Force. Their exchange of ideas about leadership, combat, and morality could make for a very engaging story.
It's really hard to say. The UNSC has some very powerful weapons and highly trained soldiers like the Spartans. But the Star Wars universe has the Force, which can be a game - changer. Jedi and Sith can move objects, predict attacks, and have superhuman reflexes. So it depends on the situation and how the story is written.