The theme of the futility of war is also prominent. The characters are caught up in a war that seems to have no real purpose or end. They face constant danger and chaos, and there doesn't seem to be any real gain from it all. It makes the reader question the very idea of war.
Yossarian is one of the main characters. He's a bombardier who is really tired of the war and the senseless rules. He's constantly trying to find a way out of flying more missions.
Catch 22 is fictional. It's a work of literary imagination that offers a unique and sometimes absurd narrative that couldn't be based on nonfictional circumstances.
The characters' actions also depict the insanity. They are constantly in a state of fear and confusion. Their daily lives are filled with absurd tasks and situations that make no sense in a normal context but are the norm in war. This chaos and lack of reason are the essence of the insanity of war as shown in the novel.
One of the main themes is the absurdity of war. In 'Catch 22', the military bureaucracy creates situations where the rules are self - contradictory, like Catch - 22 itself. Another theme is the dehumanization of soldiers. They are treated as mere cogs in the war machine and lose their sense of self and morality in the chaos of war.
I think 'the catch and other war stories' is probably a collection of tales centered around war. The 'catch' might be something unique like a significant discovery or capture during the war. The other stories would also be about different aspects of the war experience, such as combat, relationships among soldiers, and the overall atmosphere of war.
In fantasy and sci-fi, catching a unicorn might involve using magic spells or advanced technology. Maybe a special charm or trap designed to lure it in.