Self Defeating Code of Honor

 Most of the Game of Thrones/Song of Ice and Fire milleu maintains internal sense, although there's magic and other mysterious stuff.   But occasionally, deep illogic creates terrible, fatal battles for which there is really no need.  I'll cite two examples that really bother me. 

 The fight between Arthur Dayne and allies versus Ned Stark and his allies outside the Tower of Joy is just stupid.  Arthur Dayne had been ordered to protect Raegar's new wife Lyanna, who is also Ned Stark's sister.  His absence at the battle of the Trident may have cost Raegar his life, although Raegar had no way to know that.  Arthur Dayne fights Ned to the death, and Ned wins.   But this makes no sense.  Arthur Dayne is protecting Lyanna, who is Ned's sister.  Ned would never have caused Lyanna to come to harm.

The back story is that Lyanna had been betrothed to Ned's good friend, Robert Baratheon, and he was in love.  Raegar "stealing" Lyanna away was ostensibly the cause of the war.   When Robert found out that Lyanna had betrayed him, he might have killed her, and more likely her newborn son, so to some degree she did need protection.  But Ned would never have hurt her, even had his friend ordered him to.  When Arthur Dayne realized who it was that he was fighting, and that his prince had fallen, reason dictates that he should have renegotiated.   Ned and Arthur were itching for a fight, but this fight just stretches credibility.  Ultimately, they both wanted the same thing: Lyanna and her heir's survival.  A tiny bit of renegotiation would have changed things.

When I read the books, it was clear that Lyanna was dying in Childbirth, although it was never explicitly said.  That Jon Snow was the outcome of this childbirth already seemed pretty likely, and what Robert would have done with him.  Ned, for all his loyalty to Robert, was even more loyal to his family and would have protected Lyanna and Child, even against Robert.  

Sandor "the Hound" Clegane had been traveling with Arya.  He seemed to have a special care for the Stark girls, although his stated goal at the start was to "Sell" Arya to her aunt, Lyssa.  But Lyssa was murdered and they continued north.  By this point, Arya and Sandor had become good friends.  After arriving too late to deliver her to her mother and brother--murdered at the Red Wedding--they continued on, and stumbled into Brienne of Tarth and Podrick.  Once again, the goal of these two "teams" was entirely aligned--they wanted to protect the Stark Girls and deliver them to safety--a little discussion before starting to fight would have stopped the whole thing.

I'd hope that real fighters in these situations would have had a discussion and worked things out.  In both cases, there was honor at stake, but the people the promises had been made to were dead.

A lot of the fans of the show like to see the battles, and indeed these two were among the better ones.  There was a lot of clamoring for "Clegane-Bowl", and the showrunners acceded to it.   That one was less dumb.