The US Department of Defense Security Cooperation (DSCA) mission encompasses activities that contribute to partner and regional security; enhance military-to-military cooperation; enable greater interoperability; and strengthen relationships between the United States and its foreign partners. Security cooperation programs encompass defense trade and arms transfers; humanitarian assistance; disaster relief; defense institution building; and international military education and training. DSCA is the DoD lead with policy, financial, legal, legislative, programmatic, and weapons systems expertise.