As resistance to the Roman invasion, the Gallic warrior Vercingetorix marshalled troops against the Romans and their most inspired commander – Julius Caesar.

Here at Ciudad Rodrigo, there was the bloody business of siege warfare – where civilians and soldiers share the same conditions and privations.

Union forces should have seized Petersburg in June 1864, but through a mixture of confusion and incompetence they failed and a year-long siege followed.

The grim, powerful story of the "Hero City" that lost one million of its citizens as it steadfastly withstood a 900-day German siege.

The battles for the strategically-vital town in Nottinghamshire, England are classic examples of how a siege was conducted during the long and bitter English Civil War.