Original sentence: After graduation, Willard joined her family in Arizona Territory were her four brothers operated a ranch in the Verde Valley with her father's former business partner, Willard Munds (Joel Willard had died in 1879)
Edited sentence: After graduation, Willard joined her family in Arizona Territory where her four brothers operated a ranch in the Verde Valley with her father's former business partner, Willard Munds (Joel Willard had died in 1879)