Sieges and Blockades
Collecting firewood during the siege of Sarajevo, winter 1992-3
Sarajevo was besieged by the Bosnian Serb Army from 1992-1996
Bosnian Parliament hit by tank fire, siege of Sarajevo, 1992
Leningraders queue to get water from artillery shell-holes
Siege of Leningrad, 1 December 1941
The 900-day siege begat famine
A major contemporary blockade is Israel's sea, air, and land blockade of Gaza, which has been ongoing since 2007.
Suggested movies to watch:
900 Days: Myth & Reality of the Leningrad Blockade, directed by Jessica Gorter (2011)
Attack on Leningrad, directed by Aleksandr Buravsky (2009)
The Missiles of October, directed by Anthony Page (1974)