<p>I’m going to go out on a limb, and say the first half of the 20th century for a DBQ. It’s been a while since there’s been anything in that era, and it seems ripe for a DBQ. Study WWI, WWII, the progressives/populists, and the 20s/30s. It’ll probably come in handy (if not for a DBQ, then a FRQ for sure).</p>