Who invaded the Iberian Peninsula in the 700s? the Umayyad caliphate of France
the Umayyad caliphate of North Africa
Muslims from the Kingdom of Asturias
Muslims from the Kingdom of the Basques

nothing certain is known about what happened, but it seems that the country declined gradually, perhaps due to bad government, or, more likely, due to a series of bad harvests, which resulted in widespread and recurrent famine.

islam spread slowly through much of africa through trade and preaching.

sam houston basically made tx he fought for anrew lead troops in the battle of san jacinto and then became president and james polk