would anyone know why US increased spending during WWII? for what prosperity to protect it in the US? but why did they start...

The U.S. increased spending during the war because of the tremendous amount of money needed to buy weapons, vehicles, ships, and pay the thousands of armed forces members.

WARS ARE EXPENSIVE!!

We fought this war because of deadly threats from Germany and Japan.

Since France was our ally, we needed to help them

AT the beginning of WWII, Russia was ill prepared, in fact Russia only had 13000 operational tanks and maybe 200 fighter planes, the US stepped to the plate and provided 46 percent of all the work materials for Russian in her first 18 months. The US was the banker for the world in those days, as Britian, Russia, Eygpt, and the the rest of europe needed help. So the Lend\lease program was set up. This is the short answer, but we also supplied Austraila, New Zeland, and China with war materials.

During World War II, the United States increased its spending for various reasons. The primary objective was to support the war effort and ensure victory. Let me explain further:

1. National Security: The United States felt threatened by the aggression of Axis powers, such as Germany, Italy, and Japan. They wanted to ensure national security and protect American interests.

2. Defense Preparedness: Following the attack on Pearl Harbor in December 1941, the U.S. military was caught off guard and ill-prepared for war. Increasing spending allowed the government to rapidly expand and modernize its armed forces, ensuring they had the necessary resources, equipment, and training to fight.

3. Mobilization of the Economy: The war effort required extensive resources, including weapons, munitions, vehicles, and other supplies. Increased spending enabled the government to mobilize the economy, encouraging increased production and employment.

4. Job Creation: With the country recovering from the Great Depression, the government aimed to create jobs and reduce unemployment. Increased spending on the war effort stimulated industrial production, creating jobs for millions of Americans.

5. Boosting Economic Growth: The surge in government spending led to increased demand for goods and services, which in turn fueled economic growth. The war created a boom in industries, such as manufacturing, shipbuilding, and aviation, which contributed to the overall prosperity of the nation.

It's important to note that the United States didn't start spending more during WWII to seek prosperity, but rather to address the pressing needs of national security and defense. The economic prosperity was a side effect of the increased spending and mobilization of the nation's resources.