During the disturbed period in the first half of the twelfth century, when the break up of the monarchy was followed in quick succession by the establishment of the kingdom first in and afterwards in the plains of Northern India, by the invasion of the Shāh of , and finally by the overwhelming and devastating irruption of the under Chingiz the route into India by the Kuṛam Valley and Banū played a very important part, and its possession was eagerly sought after. Thus, when Mu‘izzu’d-dīn Muḥammad bīn Sām had laid the foundations of an Indian Empire, he placed his most faithful Turk servant Tāju'd-dīn Yalduz in charge of the province of Kuṛamān and Shaṅkurān, i.e. the Kuṛam Valley and Shalozān, as we are informed in the Nāṣirī, and halted there every year on his expeditions into India. After his death the successor to the sovereignty, Maḥmūd son of Muḥammad bin Sām (generally known as Maḥmūd bin Muḥammad) confirmed Yalduz in his dignities, and made him of .