What's the Difference Between Ha and Wa?

The original pronunciation is a andye, but it was written as, ha. As with a lot of sounds, it gradually changed over the years. And then in post war japan, there was a kind of spelling reform. We people decided wt were going to spell this the way it sounds. Yesyeex io explaino ed bsry wai sotehother one, the one that goes together with a, the hiragana, a and wa together. Most people don't say war any more, do they? But so that's why it's because all sounds change overtime.