 The Navarrese leaders made a last stand at the Monjardin fortress, but eventually a capitulation was signed.The investment of Pamplona lasted for a month, but the coming of winter and the arrival of reinforcements from Castile thwarted any prospects of a successful conclusion to the operation.The loyalists retreated and the Castilian troops made their way back across the Pyrenees to Saint-Jean-Pied-de-Port and Lower Navarre, engaging in regular skirmishes with the disgruntled Beaumont party Lord of Luxe.