Although many employment relationships are at-will (the employee can be terminated for any reason or none at all), it does not allow employers to act in a discriminatory way. If an employer fires an employee in violation of anti-discrimination laws, it can face serious legal problems. Federal anti-discrimination laws protect employees from being terminated because of race, color, sex, religion, pregnancy, disability, age or national origin. Not every wrongful discharge claim is based on discrimination. If an employee is given a contract of employment and it is violated, the employee can file a claim for breach of employment contract. Lawsuits can also be brought if the employer has retaliated against an employee or terminates an employee for taking time off for voting or military service.