Perhaps he selects stories based on personal experiences. Stories that he has lived through or witnessed himself are likely to be more real and heartfelt.
Tim O'Brien's short stories are often noted for their exploration of the Vietnam War experience. For example, in 'The Things They Carried', he vividly depicts the physical and emotional burdens soldiers carried during the war. The items they carried, like the letters, photos, and weapons, symbolize different aspects of their lives and the war itself.
Yes, often Tim O'Brien's works labeled as 'true story' are based on his real experiences in the Vietnam War and other aspects of his life. His stories blend fact and fiction in a way that gives a very vivid and honest portrayal of the situations he has been through.
I'm not sure specifically what that story is as there could be many different ones. You might need to watch the episode where he tells it to find out the details.
The main characters are usually those who have experienced war directly. There are also characters who are left behind, like family members of the soldiers. These characters help to show the wider impact of war on society. The soldiers themselves are complex characters with different personalities, some are brave, some are cowardly, and they all react differently to the horrors of war.
The main themes in Tim O'Brien stories are complex and multi - faceted. For instance, the theme of guilt is quite prominent. Soldiers often carry a sense of guilt for the things they did or didn't do during the war. Additionally, the theme of the relationship between the storyteller and the story is explored. He shows how stories can be a way to cope with trauma, and also how they can be manipulated or distorted. There's also a theme of the loss of innocence, as young men go to war and come back changed, having seen and done things that strip away their youthful naivete.