    ‘Sentence t Where did Fronce focus its efforts to  rebuild R's empire?    ‘Sentence 2 Fronce took control of Algeria in 1830 but  began in earnest to rebuild its worldwide empire after  1850, concentrating chiefly in North ond West Africa,  Gs well os South-East Asio, with other conquests in  Central ond Eost Africa, as well as the South Pacific.    