Jon Hart: The Mercenaries - Black Blood (UK 1977)
From the Publisher:
They are the Mercenaries
Hired by a frightened African government to help turn back the tide of a barbarous rebellion, the men of Five Commando carve a swathe of death through the blood stained black heart of Africa.
lt's their first operation together - one that welds them into a ruthless, efficient killing-machine-for-hire, ready to fight and kill in any of the world's trouble spots. For whoever will pay them.
This is the sensational first story in Jon Hart's brutal adult adventure series about modern soldiers of fortune: The Mercenaries.
Jon Hart: The Mercenaries - Black Blood. Mayflower, ISBN: 0583125891 (March, 1977), 128 p., £0.50.