What new weapon made allied leaders worry about the cost of invading the japanese mainland?

The correct answer is the atomic bomb.

Shortly after the Allied powers had success in defeating Germany in the European theatre, this group turned their attention to how to defeat Japan in the Pacific theatre. In this case, the Allied powers (specifically the United States) considered a land invasion first. This would be similar to the land invasion conducted in Normandy, France. This type of invasion was predicted to result in millions of casualties.

However, instead of having millions of casualties from both the Allied and Axis powers, the US government considered using the atomic bomb. This bomb would result in less casualties and a quicker close to World War II. This weapon completely changed the way the Allied powers thought about their strategy against Japan.

i'm not exactly sure if you should be referring to your textbook or other resources for this because they might want it verbatim, but here we go.

7: when martin luther king jr. (january 15, 1929 - april 4, 1968) was growing up, although slavery had been abolished, there was still open segregation in practice, i.e., white only restrooms and coloured restrooms. one famous incident was when on december 1, 1955, rosa parks refused to give up her seat to a white man on a bus. because of this, she was arrested, but eventually freed.

8: he was a man who spoke out to the entire nation about peace and equality, so therefore doing something for your community, or nation, is a way of honoring him because he did the same. everyone learns about martin luther king jr. he is famous in history books, most especially for his “i have a dream” speech that inspired millions worldwide. he spoke to the entire nation about freedom, equality, and peace for all. he was participation in his community and doing what was right for him and all his community. participating in service projects is a great idea to honor his dream and his memory. even thought it’s not was comes first to mind when thinking about community service projects, it is an amazing way to honor an amazing man who changed the future for the better.

hope this ! : )

although the crusades failed to capture jerusalem, they had several major impacts on western europe. they increased the authority of the king: sometimes nobles died in battle without leaving an heir in which case the king got their land. kings passed taxes to pay for the crusades.