What event caused some Hopi people to live in Navajo?

The relocation of some Hopi people to Navajo territory was primarily caused by the forced assimilation policies and land disputes stemming from the U.S. government's efforts to manage and control Native American populations in the late 19th and early 20th centuries. Specific events, such as the Hopi-Navajo land disputes and the establishment of the Navajo Reservation, led to conflicts and pressures that resulted in some Hopi individuals seeking refuge or living among the Navajo. Additionally, the broader impacts of colonization, including poverty and resource scarcity, further contributed to this movement.