In light of the indiscriminate violence and suffering of the post-Cold War era, this article examines how the United Nations responds to changes in world security in the context of the role of gender in UN peacekeeping operations. It asks whether gender-mainstreaming strategies—as outlined by resolution 1325—are actually being implemented in current UN peace operations, or whether this is merely another example of lip service paid to women’s role in international peace and security issues. Through an analysis of four gender mainstreaming strategies currently used, the paper demonstrates that such strategies are being implemented, and that the role of women in peacekeeping missions is gradually expanding. While far from ideal, the implementation process is having a significant impact.