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Qutbiddin Aibak was the first ruler of the slave dynasty. He became a ruler by a couple of stages he went through. First he was sold as a slave when he was young and then he joined the army and rose in rank and became a general. Then he became a sultan
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Iltutmish was the son in law of Qutbuddin Aibak. He continuously fought the muslim rajputs and rulers. He completed the construction of Quwwat-ul-Islam mosque and Qutb minar which were started by Qutbuddin Aibak
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Razia Sultana was the daughter of Iltutmish and she came to the throne when her brother Ruknuddin Feroz proved himself an incompetent ruler. The forty decided to put her in charge because she mastered the art of government and leadership.
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Balban was the last of the ruler of the slave dynasty. He was a capable administrator and a had a great military leadership.He reduced the power of forty because they were a threat to him and he also strengthened the army for better defence