Mezue ahịrịokwu na-esonụ: Na 21 Machị 1918, ndị Germany gbalịrị ịpụ na Michael Offensive, nke bụ akụkụ nke nnukwu mwakpo German nke oge opupu ihe ubi; ndị AIF tara ahụhụ 15,000 n'ihi mgbalị a. N'oge ọrụ a, ndị agha Australia mere ọtụtụ ihe nchebe na mwakpo mpaghara iji jide na
weghachite Villers-Brettoneux n'oge 4 ruo 25 Eprel 1918. Mgbe ndị agha German kwụsịrị mwakpo, ndị Australian Corps bidoro isonye na ọrụ "Peaceful Penetration", nke bụ mwakpo ndị a na-eme iji kpagbuo ma nweta obere mpaghara; ndị a gosipụtara nke ọma na e jidere ọtụtụ ebumnuche arụmọrụ.