Am I saying this right ?
I want to say... I went back in time to change the result/outcome of the American/Mexican war.
My attempt... Fui al pasado para cambiar el resuelto de el Americano/Mexicano guerra.
2 Answers
I would say: Retrocedí en el tiempo para modificar el desenlace de la guera americana/mexicana ( "para cambiar el resultado" also can be used)
synonyms of "to go back": volver, regresar.
I would use viajar.