Complex sentence: After the Meccan victory in the Battle of Uhud, Muhammad wanted to boost the morale of his followers and of his fighters the Mujahideen, and planned many attacks against the Meccans at Hamra al Asad.
Split into simpler sentences: After the Meccan victory in the Battle of Uhud, Muhammad planned on boosting the morale of his followers and of his fighters the Mujahideen. Therefore, to increase the morale of the Mujahideen, he planned many attacks against the Meccans at Hamra al Asad.