What's the main Idea?

I am learning to
I was able to  tell what the text was mostly about
I found this changeling  give support this main.
my step step is to Explain how the detail help me to understand the main

Should we have Animals at Wars

I am learning about ANZAC day and WW1.
I was able to find interesting facts.
It was challenging to read the book and find pros and cons and find intreesting facts
My Next step to do it on my own. Joseph helped me.