Modern war requires even more effort. Hundreds of thousands of Russians and Ukrainians are consuming much more than a Roman legion or a Spanish army in the Neth

Modern war requires even more effort. Hundreds of thousands of Russians and Ukrainians are consuming much more than a Roman legion or a Spanish army in the Netherlands. They need a constant stream of fuel and bullets and shells and more food than just bread. It's just that trucks and trains and oceangoing ships make logistics possible at this scale.