Without a successful D-Day, there might never have been an East and West Germany during the cold war. The Russians (Soviets) would have controlled all of it.
The answer to this depends on who 'we' are. Also, it depends upon what you mean by 'changes'. (do you mean politically, culturally, economically etc.)
You can bring small amounts of specified goods after part of a day. For full status you need to be in US for 48 hours.
changes to the immigrant culture.
It changes from day to day but it is usually around $1.60 to $1.80
The Japanese surprise attack upon US naval forces based at Pearl Harbor precipitated the US entry into WW2 .
Each and every day in the US only, not counting all the US dollars spent around the world on any giving day, the amount of money that changes hands daily is one point two three trillion dollars.
it helps us to day because it gave us the idea of new laws and we have also approved upon them
They brought the Catholic Religion along with St. Patrick's day.
The US used atomic weapons upon the two Japanese cities of Hiroshima and Nagasaki to bring the war with Japan to an end .
There are an unlimited number and variety of possible changes, and ways of bringing changes that you might possibly use. To get a specific answer, try to narrow your focus a bit. You might want to tell us if there is something in particular that you would be interested in changing.
That depends upon the specific desert, season of the year and time of day.
D-Day is sad because thousands upon thousands of US Soldiers lost there lives in a very short time.