Thank you for the opportunity to help you with your question!
We only have 20 minutes to answer "easy questions", so bear that in mind when reading this :)
War is thought of as a driver of industrialization. Typically industry is required to produce a mass quantity of supplies for war, such as equipment, weapons, defense systems, armor, vehicles, ships, and transit routes.
The victor in war is almost always the state that was capable of industrializing faster and more efficiently. War requires industrialization of raw materials, states that are capable of doing so self-select for victory, and there is a sudden competitive need to augment production efficiency that is typically lacking without war.
Please let me know if you need any clarification. I'm always happy to answer your questions.