koreanhistory1-3, Exercise 2: The 612 campaign (a sample; yours will differ)

Model answer:

1. In 612 Goguryeo pulled back behind the Liao River, and by June no fortress had fallen (plain, as the article states it).
2. The Sui then sent a Pyongyang force of 305,000 ("allegedly") and a navy of "some 120,000" (hedged).
3. Ulchi Mundok lured the army deep into Goguryeo and attacked at the Salsu River, "thought to be" the Chongchon; only 2,700 of the 305,000 returned (plain in the article's Salsu section, though it is the same "alleged" figure).
4. The Sui's total mobilisation is given nominally as 1,133,800 combat troops plus about 2,000,000 support troops, against Graff's modern estimate of 670,000 ("nominal" and an estimate); the article says strength and losses "may have been exaggerated by Tang dynasty historians".