Portugal 's growing isolation following Hastings ' claims has often been cited as a factor that helped to bring about the Carnation Revolution coup which deposed Marcelo Caetano in 1974 .
Marcelo Caetano is the leader of the Estado Novo regime that ruled the Portuguese Empire .
Portugal 's growing isolation following Hastings ' claims has often been cited as a factor that helped to bring about the Carnation Revolution coup which deposed Marcelo Caetano , the leader of the Estado Novo regime that ruled the Portuguese Empire , in 1974 .