Answer:
to establish a reservation on Alcatraz Island.
Step-by-step explanation:
In November 1969, a group of Native American activists comprising of 78 Indians (Indians of all tribes) occupied the Alcatraz Island in San Francisco Bay and held it hostage for nineteen (19) months in order to raise awareness about the past injustices, unfair treatment, and other contemporary problems the Native Americans were facing at the time.
Hence, the reason why the American Indians occupy Alcatraz was to establish a reservation on Alcatraz Island after reclaiming the land by right of discovery and based on the standards of the white man.
The American Indians proposed to buy Alcatraz Island for twenty-four dollars like the white men did about three centuries earlier.