They spread diseases to the Native Americans, and since they had never experienced any similar diseases they quickly died
<h2>Hope this helps you with your homework :)</h2>
Johnson did well in social and economic issues. His Great Society legislation launched many reforms
in civil rights, broadcasting, Medicare, Medicaid and education. His War on Poverty help many Americans uplift
their lives. He also helped Blacks vote
with his Voting Rights act and ended immigration proportions with the
Immigration and Nationality Act of 1965.