Answer:
It required fewer people to produce goods
This is true. Many kings would plan and carry out invasions to gain goods, land and other loot and to expand their rule because many of them worried that another power would get too strong and take over their kingdom, and every king wanted to avoid that because they had become very fond of being king.
The reason actually had little to do with Somaliland (which is a relatively peaceful and stable country) but with the fear of other countries that this will cause more chaos in the neighbouring Somalia and maybe encourage other places in Africa to split and this would cause more wars and conflicts. <span />