Retreating is not the same as fleeing
Retreating involves a strategic, controlled withdrawal to regroup and gain an advantage, while fleeing is an uncontrolled, panicky flight without a plan, often leading to defeat. Retreating can be a deliberate tactical move, like a military withdrawal to consolidate forces, or a personal decision to take time for self-reflection and restoration. Fleeing, however, lacks any strategic purpose and is typically associated with fear and a complete abandonment of a situation.
It's a conscious decision to move back from a position to achieve a future objective, such as regrouping or gaining better ground. It involves a degree of order and discipline, with the aim of avoiding rout or total destruction. A retreat is a tactic that can lead to a future victory or a stronger position.
Fleeing is a panicked reaction. It is a desperate, panicked attempt to escape danger without a clear plan or objective. It implies a collapse of order and a loss of control, often turning a tactical retreat into a chaotic rout.
In essence: Retreating is a temporary backward movement with the intent to advance later, while fleeing is a permanent, desperate escape that often signifies the end of a fight or situation.
A retreat is not fleeing in the face of adversity or running away from trouble.
The military concept of a retreat (not a rout and fleeing in the face of the enemy) is a good analogy. A retreat, or withdrawal, is a considered action. It is a purposeful stepping back from the front line to allow time to regroup, recuperate and reconsider plans.
