Peru now lay helpless at the mercy of the Chilean armies and fleet. The ports were blockaded and bombarded, while expeditions ravaged the fertile coast valleys. Nevertheless the Peruvians would not yield. The United States offered her mediation, and plenipotentiaries met to see if terms of peace could be arranged. Chile demanded the formal cession of the nitrate territory and an indemnity. The Peruvians refused such hard terms, hoping against hope for foreign intervention. This passive obstinacy enraged the Chilean government, and after a delay of several months it was determined to capture the capital and dictate terms at Lima. Late in December, 1880, a splendidly equipped army of twenty-six thousand men landed a short distance south of Lima and marched on the city. Only a few fragments of the Peruvian regular army had survived the defeats in the south, but the population rallied _en masse_ to resist the invaders. At Chorrillos, a few miles south of Lima, the militia waited behind a hastily constructed line of defence. The assault of the Chilean regulars was irresistible; four thousand Peruvians perished, and as many more were taken prisoners. The survivors fell back on a second line of defence, only six miles from Lima, and were there defeated in a second battle in which two thousand were killed and wounded. The Chilean losses in the two fights reached five thousand. On the following day the mayor of Lima formally surrendered the city, and on the 17th of January the Chilean army took possession. The helpless citizens were required to make up a contribution of a million dollars a month; the customs duties were confiscated, and the Chileans violated all the rules of civilised warfare by wantonly destroying the great and valuable public library--the best in South America.