ST. LOUIS - Dollar General is facing a lawsuit alleging that the company violated the Age Discrimination in Employment Act (ADEA) by allowed a regional director in Oklahoma to harass subordinate district managers based on their age and then fire those who complained about it.The ADEA protects workers 40 and older from age-based discrimination and harassment as well as retaliation if they report such discrimination.The lawsuit, filed Friday by the Equal Employment Opportunity Commission, seeks monetary relief for its clients who lost their jobs and asks Dollar General to prohibit any future age harassment and retaliation."Just like harassment based on sex or race, workplace harassment based on age is illegal," said Andrea G.