Why the war between Somalia and UK was costly

It is difficult to defeat a super power in a battlefield and live to savour the victory unmolested. When a super power loses a conventional war, it resorts to unconventional methods to extract revenge. This became abundantly clear to Somalia, whose guerrilla fighters outwitted Britain when the two sides met in a mismatched bush encounter.

Long after the war, the might of the gun was used. Combatants and non-combatant were forced to pay for the price of defiance by their ragtag army that had in the eyes of administrators committed the ultimate crime of killing a British sub Commissioner.
As residents of Kismayu and Afmadow retreated to the wilderness where some hid in foxholes to evade the wrath of the British troops, the superior guns were turned on the civilians as they captured all the livestock they came across.