Did america only drop the atomic bomb as a warning to russia. as Japan was well beaten.and would have soon surrendered?

No. The primary objective of dropping the Bomb on Hiroshima and Nagasaki was to force Japan to surrender. However, dropping the bomb alone did not force Japan to surrender. The Soviets declared war on Japan the day after the bomb on Hiroshima was dropped. The Russians launched an offensive into Manchuria and attacked the Kuril Islands. By the time The peace treaty was signed the Soviets were just a few islands from Hokkaido. The bomb caught the attention of the Japan and the Soviet Invasion convinced The Japanese fighting was hopeless, But Allied guarantees that Emperor Hirohito would not be removed from the throne convinced the Japanese to surrender. Take note that even with the guarantee its wasn't likely Japan would have immediately surrendered without the bomb and the Soviet attack.

Even if The bomb's secondary purpose was to intimidate the Soviets, it failed due to the Soviets already knowing about the bomb well before the Munich Conference.

Since fire bombings didn't work o Japan, the number of casualties at Okinawa and the other islands nearer to the Japanese homeland left the US no choice but to drop the bomb. When the first a-bomb didn't invoke a surrender by Japan the second a-bomb was dropped. If someone in the Japanese Cabinet had not asked Emperor Hirohito what Japan should do the war may have gone on for another few years. Hirohito said that Japan should surrender.

No.

Japan had no intention of surrendering. The Japanese had pledged themselves to total war, and the atomic bombs were used to try and convince them to surrender. It was estimated that an invasion of the Japanese home islands would require approximately 1 million men on the Allied side, and Allied commanders knew there would be horrible casualties both to their soldiers and to the civilians who the Japanese government had pledged to fight with sticks and rocks if necessary. Considering the reaction of Japanese civilians in places like Saipan, who chose suicide because of Japanese propaganda telling them the horrible things Allied soldiers would do to them, it's quite possible that there would have also been mass suicides on the part of the civilians to save themselves from what they'd been told would be a more horrible death at the hands of the Allies. The Allies had no intention of harming civilians and non-combatants other than in self defense, but the people of Japan had no idea their government was lying to them about the brutality of the Allies if they made it ashore. And they would have made it ashore, as Japan has so much coastline the Japanese military could not adequately defend all of it.

So, the atomic bombs were dropped to keep the war from continuing until all of Japan had been subdued by more conventional military tactics. The fact that the Japanese did not surrender immediately after the first bomb was released over Hiroshima speaks to their resolve to not surrender at all. It took a second bomb, the one dropped on Nagasaki, to convince the Japanese to unconditional surrender. They may have thought that the Americans had only one bomb, but once the second one was dropped they had no way of knowing how many more the US might have in reserve. What they did know was that there had been a sustained campaign of regular air raids and firebombing and that the Allies had kept it up for months and months. Was it possible they had more of those terrible bombs? The Japanese could not know, but they knew they had no choice but to surrender because they could not continue to be bombed by the atomic bombs.

The by-product of the dropping of the two bombs on Japan was to put the Soviet Union on notice that the Allies had successfully developed and deployed atomic bombs. The Soviets did not test their first atomic bomb until just a little over four years later, in late summer of 1949. By then they were well aware that they had come in second in the race. They were also aware that the Americans had already dropped two of the devices on densely-populate civilian centers, so why, exactly, would they have qualms about doing it again?

The fact that the Americans had been the first to actually use atomic bombs against people--the fact that they were willing to do it--probably kept the Cold War from escalating to a mutual exchange of atomic weapons between the Soviet Union and the United States. There were times when things came very close, like the Cuban Missile Crisis, but everyone managed to stand down.

So, no, the atomic bombs used in Japan were not used as a warning to the Soviet Union. That was a by-product of their use, but not their intended function. They were intended to shock the Japanese into abandoning their plan of total war and into surrendering. That surrender ended up saving lives. A lot of lives.

No, and Japan was not about to surrender soon. 5 months before the Hiroshima bomb was dropped the US dropped 2000 tons of incendiary bombs on Tokyo, 16 square miles of Tokyo were destroyed and over 100,000 killed. That didn't make Japan surrender. Three days after the first atomic bomb was dropped on Hiroshima Japan didn't surrender so another bomb was dropped on Nagasaki. It still took another 6 days and the threat of a third bomb for Japan to finally surrender.

That's one theory. But it could also be that we just wanted to see what the bomb could do. You can imagine how giddy American military experts were at the prospect of the US being the only nuclear nation after the war was over! Hiroshima was chosen as the first target because it was the biggest city in Japan that hadn't already been bombed by conventional bombs, so it would provide a good opportunity for damage assessment through aerial photos. Truman announced Hiroshima was a military target, and there was some minor defense industry there, but it was on the edge of town and the bomb was targeted at their city hall, the center of population.

Apparently there was a miscalculation somewhere because the bomb was many times more powerful than expected.

I think you'll find that the Soviet Union and the USA were on the same side during WWII.

Senator Joseph R. McCarthy was a little-known junior senator from Wisconsin until February 1950 when he claimed to possess a list of 205 card-carrying Communists employed in the U.S. Department of State. That was more than 4 and a half years after the US dropped the bombs on Japan. It marked the real beginning of anti-Communist paranoia and witch hunts.

Of course, the peace agreement between the allies, was bungled and the USSR instigated a land blockade. This left the divided city of Berlin marooned in what was to become East Germany and resulted in the Berlin airlift form June 1948 to May 1949.

No Japan had no intention of Surrendering. Even after the 2nd bomb was dropped the Military wanted to continue fighting. Only the intervention of the Emperor brought an end to the war and even then some of the Military tried to stop his speech being broadcast

marge is wrong in several areas

1) hiroshima was not the base for military high command

all military bases were several miles outside the city (t was personnel from these bases who helped after the bomb was dropped)

the bomb itself was targeted on the easiest identifiable location - where 2 rivers met in the very centre of the city

2) by that time in the war the navy was irrelevent (so bombing nagasaki was irrelevent to the US war effort)

(japan had no oil to fuel the ships - the biggest ship japan had, the yamato, was sent on a 1 way trip (cos they did not have enough oil to fuel its return) to attack the US and was sunk months before the bomb was dropped.

Aircraft carriers were useless (cos they didnt have any trained pilots) and they didnt have any 1st line carriers left)

3) the BIGGEST thing is that what the population believed was so far from the true situation it was pure fantasy land

The population had been lied to from mid 1942 and were told japans war situation was FAR better than it actully was, by mid 1945 it was on verge of collapse,

No.

Japan was not even considering surrender - on the contrary,they were making massive preparations to resist an expected Allied invasion of their Home Islands.

It took 2 a-bomb attacks to force a Japanese surrender,and even then a group of hard line militarists attempted to storm the radio station to prevent Emperor Hiri-hito from making the broadcast announcing Japan's surrender.

The a-bomb was used so that the Allies would not have to invade Japan,an operation that analysis at the time suggested would take at least 2 years and cost between 1 million and 3 million Allied casualties.

Japan was not beaten. The war had cost huge numbers of Japanese and American lives but Japan was prepared to defend its island. A land invasion would have cost a great number of lives in both sides. We cannot know the outcome of such an invasion but most likely neither side would have won; there would have been a negotiated peace.

And that peace would have left the Chinese and Koreans at Japan’s mercy. Japanese soldiers in China amused themselves by throwing Chinese babies in the air and catching them on their bayonets. And the story of the Korean Comfort Women is well known. That would have been the fate of many more people had a land invasion been attempted.