One Stab: Tristan died in 1963. The moon of the popping trees. He was last seen up in the North Country, where the hunting was still good. His grave is unmarked, but it does not matter. He had always lived in the borderland anyway, somewhere between this world and the Other.
Tristan: Samuel, God bless you. You are good at everything you try to do. I'm sure it'll be the same with fucking.
Samuel: Tristan, really. We're talking about my future wife.
Tristan: Oh, you're not gonna fuck her?
Samuel: No.
Tristan: No?
Samuel: No! I'm planning to be with her.
Tristan: I recommend fucking.
Colonel Ludlow: Screw'm! Screw'm all! Screw the gov'm'nt.
Samuel: Nice shiner.
Tristan: Yeah, well, I hit her back.
Alfred: Susannah, you deserve to be happy.
Colonel Ludlow: There will be no more talk of wars in this house, damn IT.
Alfred: What is he wanted for, Sheriff?
John T. O'Banion: That would be of a private nature.
Colonel Ludlow: A private nature? That's a public office you hold, isn't it, Sheriff?
One Stab: It is hard to tell of happiness. Time goes by and we feel safe too soon.
Samuel: Tristan! Get back to your unit.
Tristan: Those boys are boring. I'd rather have you watching my back.
One Stab: Every warrior hopes a good death will find him.
Samuel: Still hung over?
Tristan: Still drunk.
Alfred: Don't mind my brother. Your dog has more breeding than he has.
Tristan: Miss Finncannon. It's a pleasure to meet you. I hope you and Ugly here find every happiness together.
Tristan: Alfred's going to do well wherever he is.
Colonel Ludlow: Except here with us.
Tristan: That's my fault.
Colonel Ludlow: I didn't say that.
Tristan: I couldn't bring Samuel back home alive either, could I?
Colonel Ludlow: Don't you dare say that boy! That was in God's hands.
Tristan: Was it?
Susannah: I still sometimes dream that I'm the mother of your children. I wanted her to die.
Susannah: Forever turned out to be too long.
Alfred: You don't have to be a genius to figure out they going to come after you for this.
Tristan: Yeah. Alfred?
Alfred: Yeah?
Tristan: I want to ask you to watch over my children. Watch over Samuel.
Alfred: Brother, it will be an honor.
Susannah: Tristan, I have nowhere to send this letter and no reason to believe you wish to receive it. I write it only for myself. And so I will hide it away along with all the things left unsaid and undone between us.
Alfred: I followed all of the rules, man's and God's. And you, you followed none of them. And they all loved you more. Samuel, Father, and my... even my own wife.
One Stab: It was a good death.
Answer: Very early in the story when one stab is narrating, he's kind of introducing everybody and makes a reference about Decker having "illegally" married an Indian woman, and there are several references to the fact that the father was not happy working for a government that was killing Indians and also went out of his way to make sure they were in no way discriminated against. I think it's possible that may be why they were looking for Decker and why Colonel went out of his way to hide his living there.
I believe Decker had been a bootlegger. That would be the reason why the O'Banions (sellers of booze themselves), were with the sheriff when they came looking for Decker at the Ludlow's ranch. And also, the reason why the O'Banions didn't want to say what Decker was wanted for because.it was their own personal vendetta concerning bootleg whiskey. Maybe they had reason to believe that he was still selling bootleg whiskey around those parts. Also, later in the movie, when Tristan returns home after 7 years, Decker says to him "There's good money in bootlegging if you know what you're doing." And, Decker says that with a huge smile. Like he definitely knew what he was talking about and could definitely give Tristan some pointers about being a bootlegger.
Alcohol wasn't illegal until well after World War 1. The initial scene with the O'Bannons takes place before the boys go off to war, and it's stated afterwards that Alfred voted for the Volstead Act making alcohol illegal.
Not sure about this. At the time the sheriff comes looking for Decker, it's roughly 1915, and liquor is not yet illegal.