Sudan's national army is on the brink of retaking the capital - Sudan army retakes more of capital Khartoum from RSF - Sudan army in Wad Madani is a 'joyous victory' for the people - Sudan's military says it breaks siege of army headquarters - Sudan's army accused of ethnic killings after recapturing strategic city - US imposes sanctions on Sudan's army chief over tactics in deadly civil war - US sanctions on Sudan's army chief - Sudan's army recaptures Wad Madani from rebel Rapid Support Forces - Militia aligned with Sudanese army accused of executing men in Khartoum - Sudan's army claims first defection of senior RSF commander