Chen Yi's administration was marred by corruption, as well as a lack of discipline in the military police assigned to occupation duties, resulting in a severe undermining of the chain of command. With the rampant corruption in his administration, Chen Yi began to monopolize power. In addition to this, the island's post-war economy was failing and headed into a recession, causing people on the island to endure economic hardship. The government's program of "De-Japanization" also created cultural estrangement, along with tensions between the growing population of migrants from the mainland and the pre-war residents of the island. The building tensions erupted in 1947, when the arrest of a cigarette vendor by government agents led to the death of a bystander. The clashes between police and residents that followed quickly spread across the island, and grew into a general rebellion against Chen Yi and the Chief Executive's Office in what came to be known as the February 28 Incident. Several weeks later, government troops were sent to Taiwan from the mainland to handle the crisis and to suppress any opposition or resistance to the government. Many prominent individuals in Taiwanese society, as well as other residents of the island, many of whom had nothing to do with the incident, were either killed, imprisoned without trial, or simply disappeared. The February 28 Incident was a prelude to the white terror of the 1950s, resulting in ethnic tensions between pre- and post-war residents, as well as the genesis of the Taiwanese independence movement.