Why was the british empire so successful

the british empire was very powerful and had the U.S under its belt so to speak and they had alot to do with tarrifs/taxes

a.) d-day invasion of normandy.

hope this !

nothing certain is known about what happened, but it seems that the country declined gradually, perhaps due to bad government, or, more likely, due to a series of bad harvests, which resulted in widespread and recurrent famine.