After President Ferdinand Marcos declared martial law in 1972, concessions and rights were granted to numerous major forest companies in the Philippines. Certain islands saw more than 70% of their natural forests destroyed, including the Bukidnon province on Mindanao Island, which retained less than 20% of its natural forests by the 1980s. The environmental impact of major deforestation includes increased run-off and erosion, which can deplete local harvests and lead to greater flooding.
Ferdinand Marcos was elected president of the Philippines in 1965. Marcos was reelected in 1969 and when barred to run for a third term, he declared martial law and gave himself near absolute power. Marcos assumed full control of the military, dissolved congress, and had many of his political opponents and critics arrested. One of his more prominent critics had been Senator Benigno Aquino who was prepared to challenge Marcos in the 1973 election, had it occurred.