What was the most significant event of president lyndon johnson's term

Civil Rights Act 1964

Explanation:

The presidency of LBJ was always surround by dramatic moments starting the way he became the commander in chief, but none of them was more important that finalizing the work of JFK and having Marthin Luther King and himself signed the Civil Right Act that protected African Americans and gave them the rights of any other American Citizen.

regarding the law, the 15th amendment was specifically designed thinking in the rights of black free men.

even though ratified on february 3, 1870, the promise of the 15th amendment would not be fully applied for a long time.poll taxes and literacy tests would allow southern states disenfranchise african americans. only in 1965 the voting rights for african americans would be actually able to vote in the south.

in 1965, president johnson signed the voting rights act, which aimed to overcome legal barriers that prevented african americans from voting as it was guaranteed by the 15th amendment to the u.s. constitution.