At the front a Birdcage was the “colloquial term for the enclosure, surrounded by barbed wire, where prisoners of war were herded together during action previous to being marched to camps in rear. The names was also used for any military prison or detention quarters. "The Birdcage" was the name universally given to the elaborately entrenched position, north of Salonika, constructed in 1916 to serve as a final stronghold in the expected event of an overpowering attack. It was designed for the same purpose that Wellington constructed the Lines of Torres Vedras.” 
References / notes
- Edward Fraser and John Gibbons (1925). Soldier and Sailor Words and Phrases. Routledge, London p.23.
Glossary of terms and customs
This page forms part of our glossary of words and phrases of the Armed Forces of the United Kingdom of Great Britain during the Great War, which also includes: technicalities, trench slang, expressions in everyday use, nicknames, sobriquets, the titles and origins of British and Commonwealth Regiments, and warfare in general. Please feel free to help expand and improve this content.
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