Complex sentence: Wilson, pp.10--11 The Hagana gave priority to increasing the Jewish population by bringing immigrants into the country from Europe, and always attempted to give prior notice of an attack so that any security service personnel in the area could be evacuated.
Split into simpler sentences: Wilson, pp.10--11 The Hagana gave priority to increasing the Jewish population by bringing immigrants into the country from Europe. It always attempted to give prior notice of an attack so that any security service personnel in the area could be evacuated.