They could be after a specific person in the Pentagon. Maybe a rogue agent who has stolen some important data related to the Avengers and is planning to sell it. So, they break in to stop this from happening.
Pentagon Wars isn't strictly true. It takes some liberties and dramatizes aspects to make for a more engaging narrative. But it does draw inspiration from real events within the defense industry.
It's based on real events to some extent. But like many such stories, there might be some dramatization and creative elements added for narrative purposes.
The Pentagon Wars' true story reveals a lot of problems. In the Pentagon, there were issues with how contracts were awarded and managed. There was a lack of proper communication between the military personnel who would actually use the equipment and those in charge of procuring it. For instance, a new military technology project was initiated without fully considering the practicalities of its use in the field. As a result, the equipment developed was not as useful as expected, and huge amounts of money were spent on it, causing a strain on the military budget and hindering the overall military preparedness.
In a fanfic where the Avengers break into the Pentagon, it could be for a number of reasons. Maybe they suspect the Pentagon is hiding some dangerous alien technology that could fall into the wrong hands. They might use their unique skills to bypass security. For example, Black Widow could use her espionage skills to disable alarms, while Iron Man could hack into the security systems.
Well, without having read the 'pentagon wars novel' directly, it's hard to say precisely. However, if we think about it generally, it may explore themes such as territorial disputes related to a pentagon - shaped territory. It could also be about ideological wars where the pentagon represents a certain set of beliefs or power structure. Maybe there are heroes and villains in this story, each with their own motives for engaging in the 'wars' described in the novel.
The 9/11 attacks had a significant impact on the Pentagon. Regarding a 'Pentagon Day Care' story, it could involve how the day care within the Pentagon was affected. For example, the chaos and fear that must have ensued among the children and the staff. There may have been evacuations and efforts to keep the children safe during that terrifying time when the Pentagon was hit.