The phrase "bloody war" refers to a conflict or battle that involves a lot of violence, injury, and the loss of many lives. It emphasizes the severity and brutality of the war. Full definition
In that same year the most bloody war in the nation's history ended and the life of its great leader, Abraham Lincoln, was taken by an assassin's bullet. (religion-online.org)
To see glimpses of ordinary Vietnamese life through Theroux's vigilant eyes transcends history and time, making the dead weight of bloody war fall momentarily silent to the relentless pace of culture and man. (worldhum.com)
Even closely related Christian denominations have fought bloody wars over whose idea of God is the right one. (religion.blogs.cnn.com)