Which presidents were assassinated?

Abraham Lincoln, James Abram Garfield (1881), William McKinley (1897-1901), and John F. Kennedy (1961-63)  you should post your options but i hope this helps

Four sitting Presidents have been assassinated while in office: Abraham Lincoln, James Abram Garfield (1881), William McKinley (1897-1901), and John F. Kennedy (1961-63).

d. dr. francis collins

these civilizations were located around fertile rivers, where they could produce an abundance of crops