Question: On what date did the German offensive of which the First Battle of Villers-Bretonneux was a part begin?
Sentence (from "First Battle of Villers-Bretonneux"): After a determined defence by British and Australian troops, the attackers were close to success until a counter-attack by the 9th Australian Infantry Brigade and British troops late in the afternoon of 4 April restored the situation and halted the German advance on Amiens.
Relevant evidence: No