Liberia signs defense pact with the United States

In 1942, Liberia signed a defense pact with the United States. Rubber was a strategically important commodity, and Liberia assured the U.S. and its allies that a sufficient supply of natural rubber would be provided. Furthermore, Liberia allowed the U.S. to use its territory as a bridgehead for transports of soldiers and war supplies, in addition to the construction of military bases, airports, the Freeport of Monrovia, roads to the interior, etc. Many of the American personnel who passed through Liberia were black soldiers (who, at the time, were in racially segregated army divisions), and were deployed into military service in Europe. The American military presence boosted the Liberian economy; thousands of laborers descended from the interior to the coastal region. The country's huge iron ore deposits were made accessible to commerce. The Defense Areas Agreement between the U.S. and Liberia entailed the US-financed construction of Roberts Field airport, the Freeport of Monrovia, and roads into the interior of Liberia. By the end of World War II, approximately 5,000 American troops had been stationed in Liberia. Americo-Liberians disproportionately controlled and benefited from Liberia's growing economy and increase in foreign investment.