Sultan Ibrahimsyah and SisingamangarajaMany Toba Batak traditions linked a principal of sacred descent with the coastal kingdoms they remembered – Aceh and Barus. The latter was long recognised as a crucial port for Toba Batak
LooK at this Flag !! this is islam swords to kill people and the star and moon is a symbol of holy islam heaven.so Sisingamangaraja was islam influence or already married or javanese islam came invaded batak.