In late February, Axis forces in Tripolitania were very weak. The four Italian infantry divisions were short of artillery, the Ariete division only had light tanks, and there were only several German battalions, one of which was a reconnaissance unit with armoured cars. The HQ of the 5th Light Division arrived in Tripoli on February 21.
General Wavell didn't want to have to supply forces so far to the west, so he was against a further advance. General Dill (CIGS) supported him. They blocked any further advance at a time when it might have succeeded. Instead, they would be faced with another two years of war in North Africa, instead of ending it right then. Instead, they embarked on the Greek adventure, which was doomed to fail from the start, due scale of forces that could be committed and the difficulties on the ground.