Complex sentence: After Hitler seized power in 1933, he commemorated each anniversary on the night of 8 November with an address to the "Alte Kämpfer" (Old Fighters) in the Burgerbraukeller.
Split into simpler sentences: After Hitler seized power in 1933, he commemorated each anniversary on the night of 8 November. Hitler would address the "Alte Kämpfer" (Old Fighters) in the Burgerbraukeller.