Illustration from Portugal na Guerra magazine, which was published from 1917-1918 to "document the Portuguese military intervention in the greatest conflagration in the history of mankind".
The illustration shows soldiers of the Portuguese Expeditionary Corps (CEP), which fought on the Western Front from 1916 until the end of the war.
This is a reproduction printed professionally on high-quality matte paper.
Small prints: A4 (210 × 297 millimetres or 8.27 × 11.69 inches)
Large prints: A3 (297 × 420 millimetres or 11.69 × 16.54 inches)