"stand as one" is a correct and usable phrase in written English.
It is often used to express solidarity and strength within a group. For example, "Let's stand as one to defend our values."
We're going to stand as one and move on.
On May 1, stand as one, and exercise the rights we've always had loudly and proudly.
But we call on the demonstrators and the communities involved to stand as one and denounce the hate now -- and at every future opportunity.
This is the moment to stand as one.
Humanity would stand as one against conflict, poverty and disease.
When Tunisia is targeted, all Tunisians stand as one".
"Self-cleaning" surfaces, which repel water and aid in contaminant removal, stand as one example.
Still, economically and racially diverse metropolitan areas stand as one in American politics.
That is, one person, representing one country, had dissatisfied her: "Here you have a situation in which six if you count the European Union, seven stand as one.
Far south in New Zealand, Ezekiel Raui founded TuKotahi, which means 'stand as one', to tackle youth suicide and address mental health issues among students in the country.
The children stand as one.
