It really depends on which war the question is referring to, but if it's referring to WWII the answer would be true.
Answer:
Large bodies of water such as oceans, seas, and large lakes affect the climate of an area. Water heats and cools more slowly than land. Therefore, in the summer, the coastal regions will stay cooler and in winter warmer. A more moderate climate with a smaller temperature range is created.
Explanation:
Was it the size? I thought I heard it once but I'm not really sure.