What is the term used to describe shifting an entire country's economy toward the war effort?

The term used to describe shifting an entire country's economy toward the war effort is called "War Economy".

Explanation:

A wartime economy or war economy is the series of contingencies that a modern state agrees to mobilize its economy for war production. Philippe Le Billon describes a war economy as "a system of production, mobilization, and allocation of resources to sustain violence." Some of the measures taken include increasing the Taylor rates and the introduction of resource allocation programs. It goes without saying that each country approaches its economy differently.

Many states increase the degree of planning of their economies during wars; In many cases, this extends to rationing and, in some cases, compulsory military service, such as the Bevin Army of Women and Children in the UK during World War II. War is often used as a last resort to prevent deteriorating economic conditions or currency crises, in particular by developing services and employment in the military, as well as depopulating populations to free resources and restore commercial and social order.

'Total War' is the term which refers to the country's entire economy turning towards the war effort.

Explanation:

Total war refers to the war which is unrestricted or unstoppable in terms of weapons, territory or combating strategies involved. The laws were totally disregarded. American civil war is one such Total war which used total war strategies when the other side of the war displayed any weakness.

Total war is mainly characterized by the lack of distinction between fighting lawful combatants and civilians. The purpose is to destroy the other contender's resources so that they are unable to continue to wage war. Holy wars and crusades were such total wars in which the entire nation would use war strategy in order to demoralize the enemy combatant. Genghis Khan, Mongol Conqueror followed the total war strategy.