Some of that money will be taxed even if you do nothing. If you had half bonds and half stock, it might look like:
$1,000,000 Vanguard Total Bond with 1.4% interest/year : $14,000
$1,000,000 Vanguard Total Stock with 1.23% dividends/year: $12,300
In this case, if you stop reinvesting dividends, your first $26,300 should come from investments without selling anything. You could then sell another $53,700 worth of stock & bonds for living expenses, which should be taxed in the LTCG tax bracket of 0%.
Rebalancing is especially important early in retirement to protect against stock market crashes. Stocks have tended to grow much faster than bonds, so usually rebalancing involves selling stocks and buying bonds. If you sell stocks with the least gains, you can sell more stocks and stay within the 0% LTCG bracket. After taking what you need for living expenses, the rest could go into your bond allocation.