The Serbo-Bulgarian War of 1885
http://www.balkanhistory.com/slivnitsa_1885.htm
A detailed account of the actual events that transpired in Slivnitsa, the decisive battle of the war and site of Sergius' fictitious charge.
Common Sense About the War
http://www.gutenberg.org/files/13635/13635-h/13635-h.htm#page11
George Bernard Shaw's famous essay calling for negotiation and peace in the face of World War I. His open-eyed appreciation of the horrors of war reflect and expand on the themes in his much earlier work Arms and the Man.
Shaw's Nobel Prize in Literature in 1925
http://www.nobelprize.org/nobel_prizes/literature/laureates/1925/
The official Nobel website offers information on Shaw's prestigious award as well as biographical information and a few recordings of Shaw himself.
Shaw's First Plays
http://www.britannica.com/EBchecked/topic/539048/George-Bernard-Shaw/6605/First-plays
A description of Shaw's early plays and his evolution as a playwright. Arms and the Man, first performed in 1894, falls into the middle of Shaw's earlier period.
"Artist of the impossible": An Op-Ed About Shaw's Relevance
http://www.theguardian.com/commentisfree/2006/jul/26/gbsat150
Sunder Katwala, a journalist at the Guardian, argues for Shaw's continued relevance to the modern world and the re-discovery of many of the Irish playwright's most celebrated works.