was a Union general during the Civil War who would later become president in 1868. Although he was a war hero, his presidency was plagued with scandal and corruption. Andrew Johnson Abraham Lincoln Ulysses S. Grant Rutherford B. Hayes

They mowt likely lived in caves or maybe rock houses,i know they are similar but its all i know

Primary sources are usually  more accurate and are written by someone who experienced it or witnessed it. secondary sources are those who heard of it after the fact that can lose details and or twist the event in a light that benefits them.