Who does Atticus defend Tom Robinson against throughout the trial in To Kill a Mockingbird?

Atticus defends his client, Tom Robinson, against Bob and Mayella Ewell throughout the trial. Bob and his daughter both accuse Tom Robinson of committing assault and rape on the evening of November 21st. Mr. Gilmer is the prosecuting lawyer who opposes Atticus during the case and attempts to portray Tom as a guilty man. Atticus not only defends Tom Robinson against the Ewells and Mr. Gilmer, but he also defends Tom against the prejudiced jury and community. In the small town of Maycomb, Alabama, prejudice against African Americans is commonplace, and Atticus valiantly swears to defend his client against racial injustice. Despite Bob and Mayella's conflicting testimonies, lack of evidence, and Tom's obvious handicap, Atticus loses the case. The racist jury members convict Tom Robinson of assaulting and raping Mayella Ewell simply because he is black. Tom tragically becomes a victim of racial injustice.