So in 1658 , Mendes de Vasconcelos gathered Come_together an army at Elvas and advanced Cause_to_make_progress on Badajoz .

Taking advantage of this failure , D. Luis de Haro , invaded Attack Portugal and besieged Elvas , the main defensive system of Portugal - where the Portuguese army that had besieged Besieging Badajoz took Creating refuge and was suffering Bodily_harm a second catastrophic plague .

A small relief army was improvised by the Portuguese which inflicted Causation a crushing defeat to the Spanish army at the decisive battle of the Lines of Elvas ( 14 January 1659 ) .