An increase in the number of peacekeepers in an area did not reduce the number of incidences of forced displacement or the number of internally displaced persons (IDPs) fleeing that same area.
IDPs
Considering the plight of migrants (258 million globally) and especially refugees (26 million globally) is impossible to do without also considering war and human security. On the most obvious level, one of the many enormous costs of war is the massive human displacement it causes as people try to protect themselves by leaving the war zone.
Exposure to the Syrian war is directly associated with high rates of PTSD, suicide, and poor physical and mental health among Syrian refugees and IDPs.