Ex-South Sudan general forms rebel group, vows to topple president Kiir

By Denis DumoJUBA (Reuters) - A disaffected South Sudanese army general who quit his position last month announced on Monday that he had formed a new anti-government rebel group, underscoring mounting resistance to the rule of incumbent president Salva KiirLieutenant General Thomas Cirillo Swaka, formerly deputy head of logistics, resigned after he accused Kiir of turning the country's military into a "tribal army."The military, police and other security branches, he said, heavily recruited from