While protected Defending by the Liberal fleet , the division of Lieutenant-Colonel John Schwalbach crossed Motion_directional the river and occupied Control the Serra do Pilar , in Gaia , forcing Control the Royalists to withdraw Escaping in disorder to Oliveira de Azeméis .

Meanwhile , John Schwalbach advanced with his forces to the Alto da Bandeir and placed Placing an advanced guard at Carvalhos .