Why was 1943 a key, bellwether year?

This paper is on Why was 1943 a key, bellwether year? Briefly explain the important results of the following THREE important military campaigns of that year: the battle of the Atlantic, the battle of Stalingrad, and the pacific war

Why was 1943 a key, bellwether year?

1. Briefly explain the important results of the following THREE important military campaigns of that year: the battle of the Atlantic, the battle of Stalingrad, and the pacific war

2. Next, choose two major warring nations involved in these battles. And explain how the domestic situation in each (regarding morale, propaganda, economic mobilization, etc.) was related to these result. In other words analyze the interaction of home front and frontline at this crucibikal point in the war.

More details;

World War 2 Timeline – 1943

Important events of 1943, including the arrest of Mussolini.

4 Jan Operation Ring approved by STAVKA – Russian HQ. It entails the destruction of the German VI Army at Stalingrad, unit by unit.
8 Jan Cut off and surrounded by an entire Soviet Army Group, Friedrich Paulus, commander of the German VI Army at Stalingrad, refuses a generous Russian offer to surrender his forces. Hitler orders his general to hold position “to the last man standing.”
10 Jan Operation Ring begins at 08.00 with a massive artillery attack on the VI Army, and, as per instructions, the German troops were hunted down unit by unit.
13 Jan Two Russian armies attack the Germans at Kharkov in the Ukraine.
14 Jan The start of the Casablanca Conference. Churchill and Roosevelt agreed to increase American bombing of Germany, and to transfer of British military resources to the Far East once Italy had been defeated. Stalin, not invited, was left out in the cold!

22 Jan The Germans evacuate Tripoli in North Africa.
31 Jan Despite being promoted to the rank of field marshal the previous day, General Paulus surrenders the southern group of the German VI Army at Stalingrad. Hitler is furious that his commander chose surrender over suicide.
8 Feb The Russians retake the city of Kursk
9 Feb After six months of fierce fighting on land, sea and air, Guadacanal is taken by American forces. The campaign ended Japanese expansion plans and perhaps signified the turning point of the war in the Pacific theatre.
13 Feb Orde Wingate along with 3,000 of his Chindits cross the Chindwin River on their march into Burma, taking the fight to the Japanese in an attempt to disrupt their advance into India.