Joanna of Castile vs Shushan Tigin

After the death of her husband Philip I, Joanna of Castile became the nominal queen of Castile. However, her father Ferdinand II of Aragon and later her son Charles I of Spain assumed regency, citing her mental instability. Joanna was confined to the castle of Tordesillas for the rest of her life.

After the death of her husband Philip I, Joanna refused to remarry, despite pressure from her father Ferdinand II and other nobles. Her refusal was interpreted as a sign of mental instability, but it also reflected her deep attachment to Philip and her desire to maintain her independence.

Joanna of Castile was confined to the Royal Palace of Tordesillas by order of her father Ferdinand II, who declared her unfit to rule. She remained imprisoned there for 46 years, isolated from political affairs, while her son Charles I governed Castile in her name.

Shushan Tigin was appointed governor of the Ghana Empire by the Almoravid rulers after their conquest. He administered the former imperial capital of Koumbi Saleh and collected tribute from subject peoples.

Shushan Tigin crushed a rebellion by the Soninke people, the original rulers of Ghana, who sought to restore their independence. He used Almoravid cavalry to defeat the rebels and reaffirmed Almoravid control.

Shushan Tigin introduced Islamic administrative practices to the Ghana Empire, including the use of Arabic for official records and the appointment of Muslim judges. This began the Islamization of the region's governance.