Why did invading armies seem to get stronger as the conquer more land?

Question

Between attrition (lost in battle), needing to leave troops behind to control conquered territory, and longer supply lines, shouldn’t the armies have gotten significantly thinner and weaker.

In: 247

Answer 1

This is not always the case, specially in modern warfare. The more you move (and conquer) enemy territory, your supply lines are more likely to stretch thin and become vulnerable to enemy attack. Logistics is the backbone of any invading army, and the more you go into enemy territory, the logistics of it become more complex.