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US in WW2

The United States participation in World War 2, both European and Pacific Theaters of the war.

10,317 Questions

Why did Italy join the Allied powers?

Italy joined the Allied powers because they promised better rewards from the spoils of the war in terms of being granted conquered territories. Italy initially had an agreement with the Central Powers.

How many atomic bombs did the US drop and the end of World War 2?

  • As of August 9, 1945 the US had built a total of 3 atomic bombs and exploded all of them.
  • As of August 14, 1945 the US had built another bomb which arrived in San Francisco on August 18, 1945; but as Japan was surrendering this bomb was returned to Los Alamos unused.
  • The US had production plans and capability to build another 20 atomic bombs before the end of 1945.
  • As of the end of Operation Crossroads in the summer of 1946 the US had built a total of 9 atomic bombs and exploded 5 of them.
  • At the peak of the cold war the US had built several 10s of thousands of atomic bombs, exploded over a 1000 of them in test shots, and stockpiled more than 10000 of them. (Note: this counts only the high yield "strategic" weapons, at the same time the US had stockpiled roughly 30000 low yield "tactical" weapons. these were eliminated in the 1980s.)

What does Midway mean in USS Midway?

The name comes from the Midway Island/s in the South Pacific. It also represents the battle of Midway from World War 2. That battle was significant because it was the battle when the Allied Forces first defeated the Japanese. It also happens to be one of the Navy boys' favorite ship.

Where was eisenhower during World War 2?

In 1941 he was selected to head the War Plans division. In June of 1942 he commanded the North African landings and was made the Commander of Allied Forces in Africa. On 24 December he became the supreme commander of all Allied Expeditionary Forces in Europe.

Why did Germany and Italy declare war at the same time the US declared was on japan?

The United States went to war with Japan because of their attack on Pearl Harbor on Dec. 7, 1941. The U.S. was more or less expecting war with Japan at some point, but not at the time and place the war began.

After President Roosevelt's speech to Congress on Dec. 8, 1941; Congress declared war on Japan. The 470 for and 1 against (the sole vote against came from a profound pacifist Representative. She later voted for war against Germany and Italy [or was not present during those votes]).

The United States went to war with Germany after Germany declared war on the United States on Dec. 11, 1941. The Congressional vote for this declaration was unanimous.

How do say war in Japanese?

There are several ways to say "war" in Japanese and they are: kousen, sensou, gunryo, ikusa, senka, henran, and eki.

What is the number of troops in the battle of the bulge?

According to Wikipedia, over 840,000 U.S. soldiers and more than 500,00 Germans, totalling about 1,840,000. For details, see

http://en.wikipedia.org/wiki/Battle_of_the_Bulge

Why are Modern thermonuclear weapons are different from the atomic bombs used in World War 2?

Modern thermonuclear weapons ("Hydrogen bombs") use multiple stages to create their destructive power. It is known that most modern weapons use a fission trigger (basically a small atomic bomb) to create the energy to initiate fusion in the second stage of the weapon (the fusion stage -- the exact mechanism is classified but it could have something to do with ablation of the secondary tamper and radiation implosion) and thereby create a very large and potentially much more destructive explosion.

The two atomic bombs used by the US against Japan were single-stage weapons, but the technology used between the two was different. The yields of those weapons were in the 11 - 15 kiloton range. Modern thermonuclear weapons have higher yields in the hundreds of kilotons.

Additionally, the weapons used against Japan were very large by today's standard (especially for the small yield they had). Modern 150 kiloton thermonuclear warheads can be as small as around three feet long by maybe a 18 inches wide (these are only estimates in size) including the reentry vehicle.

Besides the technical differences outlined above, there is another, more important difference: scale.

The atomic bombs used on Japan had a yield of less than 25kT. Modern thermonuclear weapons generally start at around 350kT, and many are in the 1MT range. Additionally, thermonuclear weapons have very little upper limit: it's actually possible to build a thermonuclear device with a yield over 100MT, though they're impractical as a weapon.

Relative destructive power of a nuclear weapon is measured in Equivalent Megatons (EMT), as yield does not linearly increase destruction. The 2/3rds root of a weapon's yield (as expressed in MT) gives the EMT. I.e. EMT = MT2/3 Thus, a 1MT weapon has 1EMT of damage. A 27MT weapon is 9 EMT. And a 0.25MT (250kt) weapon does 0.4 EMT.

What all this math means is that modern thermonuclear weapons of around 1MT are roughly 12 times as destructive as those dropped on Hiroshima and Nagasaki. They also produce radically higher secondary effects, such as massive firestorms in the surrounding forests, far higher dust injection into the stratosphere, and a whole host of environmental effects that were minimally felt from the low-yield WW2 weapons.

Put it another way: the WW2 bombs were like being run over by a car at 40mph. They could cause horrific damage, but highly localized, and, ultimately, rather survivable for a country and total population. Thermonuclear weapons are like having your neighborhood crashed into by a 747 at 500mph - vastly larger effects, including large-scale environmental effects far outside the immediate target area.

WW2-size atomic weapon threatens cities with destruction. An equivalent number of thermonuclear weapons threaten entire countries with destruction, including those far outside areas actually hit with the weapons.

Who drop first atom bomb?

The United States of America, August 6 1945 Pilot of the aircraft was Col. Paul Tibbetts.

What actor was awarded the Distinguished Flying Cross?

There were four distinguished flying cross awards been gave out. The four people that have this award are Major Herbert A. Dargue, Captains Ira C. Eaker, Muir S. Fairchild, and 1st Lt. Ennis C. Whitehead.

Where is Douglas MacArthurs son?

Arthur MacArthur was born in Manila on Feb. 21, 1938. Arthur MacArthur didn't fit into the family's West Point military tradition and graduated from Columbia University in 1961. One report is that he changed his name and became a concert pianist and writer. He is still alive somewhere. In an obituary published several years ago for one of his relatives he is quite clearly listed among the surviving relatives. Some say he might be a Wall Street businessman, and another report he was an artist. Apparently he just wants to live his life quietly.

What did a soldier have to carry in his rucksack?

water

first aid pack

ammunition are the essentials, after that you have things like spare socks, cleaning kit for your weapon, waterproofs, torch, matches, toilet roll and food. (compass is generally kept in a pocket)

How much did World War 2 equipment weigh?

Sorry- you are going to have to ask a more specific question. WHAT equipment? Carried by WHO? Do you mean the equipment carried by an infantry soldier in the field, or mechanized equipment such as tanks and trucks?

How would you describe the oil embargo of the early 1970's?

The OPEC oil embargo was a serious attempt to badly damage the economies of many foreign oil dependent nations. In the US ordinary citizen drivers had to use odd and even numbered license plates to line up at gasoline stations. It was effective in the short run for OPEC nations.

Where did Americans soldiers first land in world war 2?

During World War II, the first hostile landing by American soldiers after the war began took place on the island of Guadalcanal in the South Pacific. In response to Japanese movements in the area north of Australia and New Zealand, U.S. Marines were landed on August 7th of 1942 in a bid to wrest the island from its Japanese occupiers. This operation was successfully completed in February of 1943, after months of land, naval, and air battles.

Why did the US join the war against the Nazi's?

There really wasn't much choice. After Pearl Harbor was bombed the US declared war on Japan and as a result Germany, who was an ally of Japan, declared war on US. We would have gotten involved anyway because the goal of Germany was world domination. The plan was beat England and then invade the US.

Why did Pearl Harbor matter?

It matters because its a day for rememberance for the people who have dies.

Why do people agree or disagree to dropping atomic bombs on japan?

Because that's who they were fighting at the time. It would have been silly to drop it in, say, Germany, which had already surrendered, or Italy, which was on the same side by that point in the war, or Canada, which had ALWAYS been on the Allied side.

More seriously, it was dropped to avoid a large-scale invasion of the Japanese islands, which was at the time considered the only other means of reaching the Allied goal of unconditional surrender and would have resulted in FAR greater casualties, most of them Japanese civilians, and most likely also in Japan being divided in the same way that Germany turned into the BRD and the DDR.

Should the US have gotten involved in World War 2?

No. Congress had been straining to maintain American neutrality in the war. In this they were merely reflecting the strongly held and expressed wishes of the American people. The only reason that the United States got involved in the war is because the Japanese bombed Pearl Harbor and were clearly going to keep shooting at us whether we liked it or not. Congress did of course declare war upon President Roosevelt's request but that was merely acknowledging what clearly already existed and evincing the determination to see it through. Michael Montagne

How many B29s saw action in World War 2?

It is not clear the exact number. 3,970 were built through May 1946. I estimate that at least 3,400 were completed before the war in the Pacific ended in August 1945. Of that number probably about 3,000 made it to combat units in India, China & Marianas Islands before the end of the Pacific war. The rest would have been in stateside modification work centers, in transit or assigned to training units stateside. Bottom line educated guess is that about 2,900 would have flown at least one mission during the war. I believe that a search of wartime records (by aircraft ID) could possibly reveal the actual number.

What was society and life like before the attack on Pearl Harbor?

This was one of the main events that pulled America into WWII. Without the Japanese bombing of Pearl Harbor, America may have maintained its neutrality. Some people thought that FDR had antagonized the attack by cutting off Japans oil supply. It was also a little questionable as to why the battleships were all in a line which made them easy to bomb.

How many miles were the atomic bomb on japan?

Cannot answer; depends on the yield, burst height/depth, etc. Some examples of optimal altitude airbursts:

  • Low yield tactical weapon, blast radius < 0.1 mile.
  • Tzar Bomba (over 50MTon yield), blast radius 60 miles.

Above or below the optimal altitude the blast radius of an airburst is reduced.

Surface and subsurface bursts have much smaller blast radius values than airbursts. A deep enough subsurface burst can be entirely contained and have no effect on the surface (except for a brief earthquake if underground, or millions of tiny radioactive bubbles rising to surface if underwater).