South Sudan’s largest opposition movement has asked its supporters to mobilize to defend their country days after longtime opposition leader Riek Machar was indicted and suspended from his position as First Vice President. Machar faces a slew of charges including murder, terrorism and crimes against humanity. In a Monday statement, the Sudan People’s Liberation Movement/Army in Opposition party (SPLM/A-IO), asked supporters to “report for national service” and to use “all means available to regain their country and sovereignty,” wrote acting chairman Nathaniel Oyet.