Global positioning system (gps)
Answer:
Historians did not learn much about the Harappan civilization from written sources because its writing system has not yet meen figured out. They learned much from building remains, like the drainage system, and where grains were stored.
Explanation:
On July 26, 1948, President Harry S. Truman signed this executive order establishing the President's Committee on Equality of Treatment and Opportunity in the Armed Services, committing the government to integrating the segregated military.
The correct answer is <span>Abraham Lincoln. When it comes to slavery, he was a president who supported completely abolishing it, not just preventing its spreading while allowing the southern states to practice it. He wanted to end it completely so he issued the emancipation proclamation and later the reconstruction amendments. </span>