It depends on which war you're referring to. I feel that the answer you're looking for is the radio, though.
The major causes of population growth in England during the 1800s was due to the decline in mortality rate and the introduction if New crops such as potatoes
<h3>Population growth and its Effect in England in the 19th Century </h3>
The Population of great Britain at the start of the 19th century was about 10 Million.
This was as a result of the low mortality rate occasioned by low death rate and introduction of new crops
Population growth accelerated and had a market-expanding effect to a large extent and hence triggering the industrial revolution.
learn more about Population growth at brainly.com/question/1437549
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Free elections were held in Iraq
