How to Write a Poem About the Transcontinental Railroad

I was given the commission to write a poem about the Transcontinental Railroad. I knew they were asking for a work of propaganda, but I didn't know what to do. So I read everything I could from the 19th century and run that time period. And then I had gotten this book Island in the mail and basically all of the poems that had been carved into the walls of Angel Island. That helps me because that allows me to actually contain all the stuff I was finding. It is wild. When I read that, I was like, oh, wow, this is so unvarnished in a way.