-appreciation 1898-1986 1914 1914-1918 1915-1997 1917 1stbattleof 20thcentury 2ndbattleof 3rdbattleof asphyxiatingandpoisonous battlefields battleof belgium berman campaigns exhibitions gases gorlice-tarnów guidebooks henry history ieper military modern moore pennsylvania philadelphia philip poland sculpture waruse worldwar ypres