First: change chapter headings to chapter 1, chapter 2, none of this chapter 1 part 1 stuff - chapters don't have parts, they ARE parts.
The first chapter starts like a historical document of an event, which could be a stylistic choice. But the second paragraph references OTHER historical documents, and if they were important we would be reading them.
And that paragraph is "telling" - where were the documents found? Who found them? What did they experience? Think the part of Lord of the Rings: the fellowship of the Ring (film) when Gandalf goes looking for histories on the ring, panicking, poring over dusty tomes. The film shows us what the original text merely hinted at, which is why modern literature thinks cinematically. Depict a scene, don't tell people how to feel about it or what to think.
Here is one of your paragraphs:
Did they fire once an hour? That seems slow. Did they fire 24 in quick succession? It is unclear. Why would that be significant?
Now try this:
"Vincenzo nocked an arrow to his bow and drew back the string. One of the abominations flew past the battlements, its wings a blur. His keen eyes focused on the monster's armour plating and spied a gap that exposed flesh. He ignored the knot in his stomach that the repulsive creatures inspired and took aim. Vincenzo loosed his arrow and his heart soared as it struck the intended target. He started to smile, but the demoni flew on, unaffected. His face fell and his stomach tightened worse than ever."
The most "telling" part is describing his eyes as "keen" because that isn't something the audience could see in a film. But it's an unnecessary word because hitting his target implies it. However, it could be defended as part of the writer's style.
You can defend a word choice. You can't defend a bad chapter.
Personal quibble with anyone on this site: it is kind of obnoxious to come to the forum asking for reviews when you haven't reviewed anything yourself. This community exists because of voluntary communal participation. Otherwise it would be just Chris, more overworked than he already is, and he's a volunteer too, making this place possible for free.