[1] After Rengua's death in 1837, his son Mamkinga, along with his three brothers (Kishongu, Kileo, and Samanya) engaged in a power struggle that marked the decline of the Machame Kingdom throughout the 19th century.
[4] Mamkinga emerged as the mangi king of the territories situated east of the Kikafu River, receiving tributes from the Masumba people in the form of cattle, goats, and ivory during periods of relative stability.
Evidence from the accounts of Rebmann and von der Decken suggests that Mamkinga's ascension to power involved strategic relocation to Wari, positioning him advantageously for trade with Swahili caravans.
[4] Mamkinga's reign is often viewed as a brief and unclear period before the more defined rule of his son and successor, Ndesserua, who is characterized as a violent and tyrannical figure with a penchant for parricide.
Von der Decken described him as a strong young man, approximately 20 years old, noted for his fearful demeanor and volatile temperament, while also being intimidated by Tatua, the successor to the elderly Kashenge in Kibosho.