The creation of the municipality of El Garbanzal Historical milestone · La Unión, Campo de Cartagena, Murcia Image of La Unión, not of the place itself. A royal decree of Isabella II of 1860 detached from Cartagena the hamlets of El Garbanzal, Herrerías, Portmán and Roche to form a municipality of their own, born in the heat of the flood of immigrants brought by the mining fever of the range. 1 de enero de 1860 Photo: B.N.Sanchez. (CC BY 4.0) What to see and do in La Unión