How does racial inequality shape who dies in war? Focusing on the era of United States military segregation, we argue that discriminatory societal institutions and prejudicial attitudes combined to reduce commanders’ beliefs about Black soldiers’ combat effectiveness. These biased assessments decreased the likelihood that Black soldiers were assigned combat occupational specialties, and that Black combat units received key frontline assignments. However, commanders’ biases also created a desire to preserve white lives. Accordingly, we expect Black soldiers received worse support. These choices shaped soldiers’ risk of death. Analyzing the case of World War I (WWI), we leverage data on over 44,000 infantry fatalities and show that white units incurred four times as many combat fatalities as comparable Black units. However, holding fixed exposure to combat, Black units suffered higher levels of noncombat deaths. Commanders thus deemed Black soldiers insufficiently qualified to fight as equals, but sufficiently expendable to die in war’s least consequential conditions.