"She Had Some Horses" By Joy Harjo

The strife of the Native American/American Indians seems to be the point of this poem. Yes, each "horse" is a different person. Each equine is another soul; some large, some small. But "she"? Who is "she"? I guess "she" would be the one we commonly refer to as "mother nature". However, I wish the rest of this piece focused slightly more on this aspect. After all, as the title suggests, it is "she" who had them. And "she" is a very large player is this game.
I understand (at least I think I understand) the loss and hardship these people had to endure due to dwindling tribes, and isolation, and so forth. I just wish there was more of a visible thread to follow here. Instead, the more I read on, the more I just felt a general sense of confusion and desparation. But maybe this is all I was supposed to............