Answer
As a little soldier, Agrippina ensured her son Gaius stood out amidst the military presence in Gaul. Dressing him in this manner aimed to create a strong, authoritative figure among the troops, bolstering his credibility as a potential leader and enhancing his chances of gaining support and loyalty from the soldiers under his command. This strategic decision reflected Agrippina's shrewd political instincts and unwavering dedication to securing her son's future.