Peruvians preparing their defences against the Spanish bombardment of Callao on 2 May 1866.
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Photograh from Museo Naval del Perú
Unknown author<span style="display: none;">Unknown author</span>
<a rel="nofollow" class="external free" href="https://books.google.de/books?id=DkgGVTOr2EsC">https://books.google.de/books?id=DkgGVTOr2EsC</a> p 853