Portugal's precarious financial position and military weakness threatened the retention of its colonies. In 1891, António José Enes, the Minister of Marine and Colonies, rationalised taxes, and granted concessions in Guinea, mainly to foreign companies, which could increase its exports. The increased revenue was designed to fund a gradual extension of control, to allow Portugal to tax trade and the indigenous people. The modest increase in government income between 1895 and 1910 did not meet the costs of European troops used to impose taxes. Enes' policies largely failed; resistance continued in the interior, on the islands and at the coast. However, once military occupation had started, Portugal continued, hoping for future benefits.