How does Hemingway show that war is disrupting the lives of the people?

From the story, "Old Man at the Bridge", we can infer that people of Spain have abandoned their homes, left behind their livestock and family pets, along with any personal belongings they couldn't carry. The people are exhausted, hungry, and many travel by foot..... awaiting artillery fire and the advance of the Facist army. Many have nowhere to go.... and many have nothing beyond the things they've left behind.