To be exact, different occasions will be called Ula, and the words that can be translated are different, such as:

When you are extremely excited, you will shout "Hula", which translates as "Long live".

On the battlefield, when you charge, you will also shout, shout, someone translates it as rush! Kill!

I specifically asked the Russians, and they said that the original meaning of this word is to kill people! Later, it was extended to modal particles to express all kinds of passionate emotions.

Look!