May 22, 1850.—Outbreak; two Americans killed. War vessel demanded to quell outbreak.
October, 1850.—Revolutionary plot to bring about independence of the Isthmus.
July 22, 1851.—Revolution in four Southern provinces.
November 14, 1851.—Outbreak at Chagres. Man-of-war requested for Chagres.
June 27, 1853.—Insurrection at Bogota, and consequent disturbance on Isthmus. War vessel demanded.
May 23, 1854.—Political disturbances; war vessel requested.
June 28, 1854.—Attempted revolution.
October 24, 1854.—Independence of Isthmus demanded by provincial legislature.
April, 1856.—Riot, and massacre of Americans.
May 4, 1856.—Riot.