Palmyrans: Researching Tower Shield is 30% faster.
History[]
“
The Romans adopted a tall rectangular shield that gave them advantages in battle when used properly. The size of the shield protected more of the body. The Romans fought in tight rectangular formations of approximately 100 men called maniples. The shields of the men in the maniple presented a continuous front, or shield wall, which protected them greatly from missile fire. They developed a formation variant called the Testudo (or turtle). In this formation, the shields covered all four sides and the heads of the men, allowing them to advance under missile fire. This was useful when advancing toward a gap in an enemy wall.
”
—The Rise of Rome manual
Trivia[]
The technology icon shows a Scutum, a rectangular shield which saw use in the Roman Empire starting from about 40 AD and is the Romans' crest (icon) since Return of Rome.