The answer is the Coast of Somali
I don't know if we are talking about the same war but the immediate consequence for Africa of the declaration of war in Europe was the invasion by the Allies of Germany's colonies. Neither side had prepared for war in sub-Saharan Africa. Indeed there was short-lived hope that it might be isolated from the war.
Answer: It evaporates and recirculates through the rain cycle, so we do get it back
Explanation:
A. appeasement
that should do it