The main information is from the book, Jamaican Volunteers in the First World War: Race, Masculinity and the Development of a National Consciousness, by Richard Smith, Manchester, Manchester University Press, c. 2004, ISBN: 0719069858. Review of book
The two main units mentioned and expounded upon in this marvelous book are the West India Regiment(s) (WIR), which was made up of mainly Jamaicans; and the British West Indies Regiment (BWIR), which was made up of members from different West Indies colonies. See pp. 57-58, 88-90.
The British West Indies Regiment (BWIR) was divided into 12 battalions. (p. 80).
1st Battalion, pp. 89-90; 2nd Battalion, p. 90; 3rd Battalion, p. 133; 4th Battalion, pp. 83-85, 126; 6th Battalion, pp. 82, 84; 7th Battalion, p. 154; 9th Battalion, pp. 83, 130; 10th Battalion, p. 130;