The question is in the World War 1 category; I'm not positive whether that's the war you're referring to or not.
However, in general, most nations no longer maintain a large standing military force due to the expense, so during a war, a lot of workers have to temporarily become soldiers. This means that there are fewer people to do ordinary work, and thus generates a shortage of labor. This was particularly important in 20th century wars when a lot of military equipment was large and highly mechanized... it takes a lot of labor to make, say, a tank or an airplane.
Food
A food shortage
food and supply shortage
World War II created a labor shortage in America. This resulted in many women entering the workforce to fill jobs previously held by men.
too much emphasis was on industrialization
because of world war 1
Women workers.
Women made up about a third of all workers laboring in war-related industries during World War II. This significant increase in female workforce participation was due to the shortage of male workers who were fighting in the war.
Food
Because they had a shortage in workers so they needed to have more people.
during the civil war workers would wear boots, apron, overalls, gloves
A food shortage
because people were cowards during the war
food and supply shortage
The West had a shortage of workers, and China had many workers.
i think its ireland..
it means the shortage of labor workers or that there is no enough workersl employees to do the work in a nation.