Fate: I Will Eventually Become the Hero of Justice

During the Western Roman Empire era, the Romans were skilled in producing iron tools. However, they used a low-temperature smelting method for wrought iron that prevented the production of steel, and made it challenging to separate iron and slag. Moreover, carbon could not penetrate quickly, which resulted in the empire's low iron production capacity.

Interestingly, there were court mages and wandering magi who practiced alchemy to create various metals, including the legendary mythril. They would then process these metals countless times, transforming them into powerful Mystic Codes.

Unfortunately, creating Mystic Code was a time-consuming process, and magi were a rare commodity, making them an unsuitable option for being the primary force in metal production for a country. Therefore, the production of iron tools and weapons required a significant amount of labor time, resulting in an extremely inefficient process.

The main issue with iron tools and weapons was their susceptibility to rust, cracks, and instability. Despite advancements in handicrafts and the emergence of higher quality iron tools and weapons, bronze was still the preferred choice for creating most metal objects. Consequently, the majority of commonly used objects were made of bronze.

In the Western Roman Empire, weapons were primarily composed of a mixture of bronze and iron, while farm tools were typically made of wood, similar to the Warring States period in the modern world.

The reason why iron tools became popular during the medieval era was due to the invention of the wootz steel method. Shirou also noticed that the weapons and materials provided by Sir Ywain were mostly made of bronze, with only a few items made of iron.

It's worth noting that bronze is created by combining copper and tin, making it the primary raw material for making bronze objects.

Copper tools and weapons are not very durable and lose their sharpness quickly. However, adding tin to copper can increase its toughness and make it easier to cast molten metal into molds, resulting in useful items such as axes, hammers, and jewelry.

Both copper and tin were essential resources that contributed to the prosperity of ancient civilizations. Interestingly, Cornwall had nothing else but tin mines and copper.

With the collapse of the Western Roman Empire, various movements such as the Bagaudes in Gaul and the Aghlabid revolt in North Africa have emerged, leading to wars of all sizes on the European continent. Other than the absence of mysterious disappearances, magical beasts, and gods, the situation is estimated to be even more lively than in Britain.

During this era, the need for strategic resources such as tin and copper was significant. Shirou recognized this and requested Merlin to use "Clairvoyance" to investigate the situation on the European continent. The results were quite promising, indicating that these resources were in high demand.

On the other side of the English Channel, King Ban of Benoic and his brother, King Bors, were engaged in a battle against King Claudas in the Gaul region. To give Shirou a better understanding of the situation, Merlin projected the battlefield of the three-party war for him to observe. It was on this battlefield that he recognized a familiar figure.

Amidst the chaos of the battlefield, a young and powerful knight with purple hair was wielding a sword, ruthlessly slaying his opponents. As Shirou observed the battle, he recognized this figure and uttered a name, "Lancelot!"

After observing the battle involving Lancelot, Shirou requested that Merlin investigate other areas. While there was no war on the island of Ireland, conflicts were occurring between the Burgundians and Basques in the vicinity of the Gaul region on the European continent.

As the Western Roman Empire declined, its soldiers spread out across various regions, engaging in sea battles against the Vandals who had taken over Carthage in North Africa and fighting against the Visigothic Kingdom in the southwest.