I think it's the revolutionary war.
As being a brass instrument player, I can answer this easily. Some similarities are they are made of brass (of course). They all take air to play. You also have to buzz your lips into a mouthpiece that only brass instruments have. Some differences are they are different sizes. Different instruments take more or less air to play.
I think b....I did the tutorial
Answer by YourHope:
What led to the decline of the Mongol Empire?
The Mongols were too focused on conquest and not on governing. Its empire was too diverse and the land was too vast and the empire had weak rulers and political instability. The Black death wiped out most of the population!
:)