Original sentence: These documents provided evidence that high-level officials were concealing serious doubts about whether the U.and allies would prevail in the Indochina conflict; they also seemed to suggest that these official had callous attitudes (similarly concealed) about the likelihood of very high casualties in the future
Edited sentence: Further, the papers showed that high-ranking officials had a deep cynicism toward the public, as well as disregard for the loss of life and injury suffered by soldiers and civilians.They revealed that the government had knowledge all along that the war would not likely be won, and that continuing the war would lead to many times more casualties than was ever admitted publicly