Charles Townshend and his army: 6 Indian Division in the fall of 1915
Townshend's advance on Baghdad: September-November 1915
Retreat from Ctesiphon: 25 November-7 December
Outset of the siege: December 1915
Operations of the relief force: January 1916
Deprivation and defeat: February-March 1916
Innovation, starvation, and surrender: April 1916.
The Siege of Kut-al-Amara : at war in Mesopotamia, 1915-1916 by Nikolas Gardner. ISBN 9780253013842. Published by Indiana University Press in 2014. Publication and catalogue information, links to buy online and reader comments.