Dwarvan Infrastructure.

After receiving the esteemed title of Baron from the Dwarven King, Jack's mind buzzed with ideas. The Dwarven capital, while grand and filled with intricate stonework, lacked proper infrastructure for efficient movement. The roads were rough, uneven, and prone to damage from the heavy carts and armored warriors who traversed them daily. Jack knew exactly what needed to be done—he was going to introduce concrete roads to revolutionize the city's transportation system.

Jack wasted no time and gathered a team of skilled Dwarven craftsmen and engineers. Using his extensive knowledge of construction and materials science, he explained the concept of concrete—a mixture of crushed stone, sand, water, and a binding agent that could create smooth, sturdy roads capable of withstanding immense pressure. The Dwarves, while initially skeptical of this strange human technique, were fascinated by Jack's explanations and eager to see the results.