AtlasTerritory · PR
Puerto Rico
Ceded by Spain in the Treaty of Paris after the Spanish–American War. US citizens since 1917 (Jones–Shafroth Act).
Capital San Juan. Treaty of Paris signed, December 10, 1898.
Militia. 1511 is the Guard's own lineage claim, not a federal finding; the Puerto Rico National Guard was organized as a US force in 1919.