Well, in the 'big mom is luffy's mom fanfic', they might have crafted a story where Big Mom is Luffy's mom. But it goes against what we know from the official 'One Piece' story. Fanfictions like this can be really interesting as they can rewrite the story in unexpected ways. They might have some interesting plot twists and explanations within the fanfic to justify this relationship, but it's not part of the main 'One Piece' universe.
One possible plot implication could be a change in Luffy's power source. Since Big Mom has such unique and powerful abilities, Luffy might inherit or be related to some of those powers in the fanfic. Maybe his Devil Fruit ability could be related to Big Mom's in some way.
The outcome is kind of ambiguous. Luffy shows great strength and determination but doesn't defeat Big Mom completely. The battle has many twists and turns that keep you on the edge of your seat.
In an army mom story, a big challenge is separation. The mom has to get used to not having her child around. It's not just the physical absence but also missing out on important events in their child's life. For instance, birthdays, graduations while they are deployed. Another challenge is dealing with the after - effects of military service on their child. If the child comes back with PTSD or other issues, the mom has to learn how to help and support them through it, which requires a lot of knowledge and patience.
As of now, in the manga, the identity of Luffy's mom remains unknown. There have been many theories and speculations among fans, but no official confirmation.
If Naruto were to fight an army in fanfiction, he would bring his unique skills to the battle. Naruto is known for his never - give - up attitude. So, even if the army seems large and intimidating, he would keep fighting. He could use his Uzumaki bloodline abilities, like his strong life force and large chakra reserves. Also, his ability to make friends and allies might come into play. Maybe he would convince some members of the army to switch sides. His transformation into different forms, such as the Six Paths Sage Mode, would give him an edge in combat. With his speed, he could quickly move around the battlefield and take out key targets in the army.
Well, without more details it's hard to tell the exact 'angry army mom story'. It might be a story where an army mom is angry because her son or daughter is being sent on a dangerous mission without proper equipment. Or perhaps she's angry about the lack of support for military families in terms of housing or medical care.
His friends from the Hidden Leaf Village might help. For example, Sasuke could be a powerful ally. He has his Sharingan and his own set of powerful jutsu.
Naruto would face the psychological challenge of fighting alone. He is used to having his friends by his side. Without their support, he might have moments of self - doubt. The army might also use psychological warfare against him. They could taunt him or try to make him angry to disrupt his focus. In terms of actual combat, the coordination within the army could be a big obstacle. If they are well - organized and work together effectively, they could set up complex traps and ambushes for Naruto. And if the army has access to some sort of large - scale destruction jutsu, Naruto would have to find a way to either avoid it or counter it.