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On the sign:
AQUI NASCEU EM 14 DE MARÇO DE 1895 O SARGENTO ALVARO FERNANDES MORTO GLORIOSAMENTE NA BATALHA DE LALYS NO DIA 9 DE ABRIL DE 1918
The plaque indicates the birthplace of the sergeant who fell in the Fourth Battle of Ypres (Battle of Lys), an attack by German forces with the aim of capturing the city of Ypres in northern Belgium, against British and French forces. A battle in which both sides suffered heavy losses.