 Complete the following phrase:  After its April 1974 Carnation Revolution, Portugal initiated a gradual decolonisation process, and East Timor descended into a civil war between supporters of the Timorese Democratic Union UDT and Fretilin. In October 1974, Indonesia began military operations to incorporate East Timor. Fretilin unilaterally declared independence on 28 November 1975 in an attempt to forestall this, but on 7 December Indonesian forces invaded East Timor. 