Wheels of Fire — Terence Strong

A former SAS soldier is summoned to war-torn Bosnia to replace a negotiator in the struggling Royal Wessex battalion. His mission: to keep the wheels of the UN relief convoys running at all costs.
But his Company commander isn't up to the job and his oppo in liaison is running his own agenda for MI6.
The uneasy Muslim-Croat alliance is breaking down with the arrival of fundamentalist fighters from Afghanistan…Then there are mercenaries for hire and the CIA stirring the pot for its own ends.
Only the arrival of the winter snow brings a welcome lull to the mayhem. But it brings another problem. It's vital that one huge aid convoy runs the gauntlet of fighting along the icy mountain roads to break the siege of Sarajevo before Christmas.
Defying all odds, the twin air-horns of a hundred trucks blast defiantly as their giant wheels begin to roll on a journey to hell and back…