WW2 in Liberia

I understand that during the earlier part of World War Two, Liberia remained neutral even though it traded with the Allies from 1939 until it joined the war in 1944. Liberia remained the Allies main source of rubber (along with Ceylon) throughout the war, and the Freeport of Monrovia was constructed in 1944 to assist in the war effort and improve the export of rubber and iron ore. Behind the port, to this day, remain two large WW2 gun emplacements, that housed large guns that could protect the Freeport. Photo of the Western emplacement. Olly