The UN Security Council’s Resolution 1325 was the first to specifically address women in times of peace and war. In order to maintain and advance peace and security, including conflict prevention and resolution, peace negotiations, peacebuilding, peacekeeping, humanitarian assistance, and post-conflict reconstruction, the resolution emphasises the necessity of women’s equal participation and involvement in all such efforts. Despite having several gaps that needed to be filled, the first resolution did contribute to the protection of women and girls under international law. The contribution of S/RES/1325 is discussed in this article in some detail.