Are global variables always initialized prior to any global thread_local variables?

Question

struct A
{
    A() : n(1)
    {}

    int n;
};

struct B
{
    B() : n(2)
    {}

    int n;
};

thread_local A a;
B b;

int main()
{
    return a.n;
}

a is defined before b.

My question:

Does the C++ standard guarantee B::B() is called before A::A() is called?