Complex sentence: Sacasa denied the unknown Sandino's requests for weapons and a military commission; however, when the insurgent captured some rifles from fleeing Conservative soldiers, the other Liberal commanders agreed to grant Sandino a commission.
Split into simpler sentences: Sacasa denied the unknown Sandino's requests for weapons and a military commission. But, after the insurgent captured some rifles from fleeing Conservative soldiers, the other Liberal commanders agreed to grant Sandino a commission.