Complex sentence: In 1966, the Ayub administration began talking to France over the development and acquisition of the Daphné-class submarine, and French renamed submarines, according to Pakistan Navy's standards, the Hangor-class submarine on 28 June 1969.
Split into simpler sentences: In 1966, the Ayub administration began talking to France over the development and acquisition of the Daphné-class submarine. France began to rename submarines according to Pakistan Navy's standards, like the Hangor-class submarine on 28 June 1969.