Discuss PGroot's answer to: How do u know when god is with u?

You can proclaim it, but that doesn't make it true.  The late Roman Empire had it as a motto; they fell eventually.  Germans in World War II had a motto "Gott mit uns" but they lost the war.

It goes back to Isaiah 7:14, quoted in Matthew 1: 23:

'Behold the virgin shall conceive and bear a son, and his name shall be called Immanuel, which being interpreted is God with us'

So Christians can claim "God is with us" as they fight each other.