USMC fiction novels often feature strong themes of brotherhood. Marines are shown relying on each other in tough situations. They also tend to highlight military discipline. For example, in 'Marine Sniper', Hathcock has to follow strict military protocols while on his missions. Another characteristic is the portrayal of combat. These novels vividly describe the chaos and intensity of battle.
The USMC Christmas story could involve Marines experiencing Christmas while on duty or away from home. It might include tales of camaraderie during the holiday season. For example, they could be sharing a simple meal together in a military base far from their families, but still finding the spirit of Christmas through their bond with fellow Marines.
One horror story could be recruiters giving false promises. For example, they might promise a certain job or training opportunity that never materializes once the recruit is in. Another could be the extreme pressure tactics. Some recruits have reported being constantly harassed by recruiters to sign up, even when they had doubts or family issues that should have been considered. And there are also stories of misinformation about the physical and mental demands. Recruits were led to believe it was less intense than it actually is, leading to a lot of shock and struggle during basic training.
Sorry, I'm not aware of a specific Naruto is a USMC fanfiction off - hand. You can try searching on popular fanfiction websites like FanFiction.net or Archive of Our Own. Use keywords like 'Naruto' and 'USMC fan' to narrow down your search.
One key element is the sense of brotherhood. Marines look out for each other during Christmas, even if they're missing their own families. Another is the military discipline that still prevails during the holiday. They have duties to perform but also find ways to celebrate.
One funny story is about a recruit who was so nervous during drill that he started marching in the wrong direction while the drill instructor was yelling commands. Everyone else was trying hard not to laugh out loud. Another time, a recruit accidentally put his helmet on backwards during a field exercise and didn't realize it until his buddies pointed it out, looking like a comical alien.
One horror story is the extreme physical exhaustion. Recruits are pushed to their limits with long marches, intense PT (physical training) sessions that seem never - ending. Some recruits have passed out from the heat and overexertion during summer training. Another aspect can be the mental stress. Drill instructors yelling constantly, and the pressure to perform every task perfectly. One recruit I knew was so stressed about making a mistake during a drill that he couldn't sleep for days.
One USMC ghost story is about a Marine who saw a shadowy figure in an old barracks that was said to be haunted. He heard strange noises like boots marching when no one was there.
A memorable one is when a new recruit tried to salute an officer but his hat flew off in the process. It was windy and he had not secured it properly. Everyone had a good laugh.