Siege of Niebla (1811) In 1811, the castle's French garrison, under Colonel Fritzhardt, with 600 Spanish and British deserters plus six cannon and two
obuses, was briefly besieged by
Blake and
Zayas's division. Instead of marching on Seville, as planned, Blake laid siege to the castle for five days, from 30 June to 2 July. Although the siege itself was not successful, it did serve to draw 11,000 French troops into a remote corner of the region for some weeks. ==Cultural references==