 Complete the following phrase:  It was opened on 2 April 1971 when the line was extended from Gambetta in order to improve the service to the town of Bagnolet. It has since been the new eastern terminus, replacing the previous terminus at Porte des Lilas, the section between the latter and Gambetta station, disconnected since 27 March 1971 and became the current line 3 bis. It is situated on the Avenue Gallieni, which is named after General Joseph Gallieni, famous for commandeering 600 taxis to take troops to the front to help save Paris during the 