Cesar Chavez was a Mexican-American labor leader who used non-violent methods to fight for the rights of migrant farm workers in the southwestern USA. Migrant farm workers are people who do farm labor, moving from farm to farm and from town to town as their work is needed - it is difficult work that pays very little and can be dangerous due to the use of pesticides (pesticides are chemicals that kill bugs and can make people sick).
Chavez founded a group that advocates for the rights of farm workers, acting to increase wages and improve the working conditions and safety of farm workers. He also organized strikes (when workers refuse to work until improved working conditions and salary demands are met) and nation-wide boycotts of agricultural products in order to help workers (a boycott is a protest in which the public is asked not to buy certain products). Chavez went on many hunger strikes, refusing to eat until violence against strikers ended and until legislators (law makers) voted to make laws improving the lives of farm workers. He was also jailed many times during his fight against terrible migrant worker conditions.
Cesar served in the US Navy during World War 2. When Cesar Chavez returned from the war, he labored as a farm worker inCalifornia. Chavez married Helen Fabela in 1948; they eventually had 8 children and 31 grandchildren.