With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Before the Roman invasion Caratacus is associated with the expansion of his tribe's territory. His apparent success led to Roman invasion, nominally in support of his defeated enemies. He resisted the Romans for almost a decade, mixing guerrilla warfare with set-piece battles, and was successful in the latter. After his final victory he fled to the territory of Queen Cartimandua, who captured him and handed him over to the Romans. He was sentenced to death as a military prisoner, but made a speech before his execution that persuaded the Emperor Claudius to spare him.
text_B: Would opposing generals facing Caratacus in a set-piece battle have felt confident before the fight?
NO.