What action resulted in georgia being placed under military rule during reconstruction?

In 1867, the Georgia state legislature refused to ratify the Fifteenth Amendment to the Constitution of the United States, which gave African-American citizens the right to vote. In this way, the state of Georgia prohibited its black settlers from voting for their authorities, even though the federal government enshrined this right.

In response to federal pressures to ratify this Amendment, pressure groups of the Klu Klux Klan were formed in the state, thereby turning the situation into violence and requiring a military presence to calm the waters. Finally, in 1868, Republican Rufus Bullock was elected governor of the state and the amendment was ratified in 1870.

the values of the selma marchers was to bring   their ability to vote into law. mlk was not hat march, which was protesting toward lbj

could you show the options for the answers? : )