To which religion did mary i belong when she became the queen of england?

   Catholic

Explanation:  Mary I, from the Tudor family, was the queen of England and Ireland from 1553 to 1558, i.e. until her death. She was known for her unscrupulous struggle against the Anglican Reform Church, i.e. against the so-called English Reformation. In an effort to restore Catholicism, a number of bloody executions took place where the Protestants were killed, which is why she was called "Bloody Mary".

it was the "4. potsdam" conference that demanded the unconditional surrender of japan, since it was clear that the japanese would continue to find until the very last man otherwise.