The most widely used databases developed by the project include an identification of independent states since 1816, a list of interstate and civil wars since 1816, a list of "militarized disputes" (militarized crises that end short of war), and national capabilities measured annually for all countries since 1816 (including the size of countries' military, their energy consumption as a proxy for industrialization, population size, urbanized population, and raw material production of iron and steel). Other databases include an identification of all alliances since 1816, territorial relationships and changes over time, and membership in intergovernmental organizations. All Correlates of War databases are available free for public and academic use with proper citation.