Pig iron production in Europe 1900-1945, by country
Output during the world wars differed, however, as there was an observable decrease in most countries during the First World War, whereas output remained much higher during the Second World War. The impact of many other major political and economic events is reflected in the output of pig iron in these countries, such as the Great Depression of the 1930s, or more regional events such as the Russian Revolution from 1917-1923 or German hyperinflation in 1923.