“Conflict can cause food shortages and the severe disruption of economic activities, threatening the means of survival of entire populations. Additionally, wars commonly trigger the displacement of huge numbers of people, cutting them off from their food supplies and livelihoods.”
Source:
https://www.nationalgeographic.org/article/hunger-and-war/
“Scorched earth tactics are another way in which conflict drives hunger. As land and productive assets are deliberately laid to waste, starvation is used as a weapon of war and communities are forced to move. Insecurity also leads to the closure of large markets, affecting cross-border trade and local food supplies.”
Source:
https://www.savethechildren.org.uk/content/dam/gb/reports/policy/Hunger%20-%20a%20lethal%20weapon%20of%20war%207th%20pp.pdf