The three prefectures Champa ceded in 1069 (Bố Chính, Địa Lý, Ma Linh) lie between the Ngang pass and the Thạch Hãn.
Settlers were brought in and the ground surveyed in 1075, but the campaign board calls it thinly held and changing hands with the fortunes of the two courts, a march in a weak reign. We draw it as a Ly claim backed by settlers and posts: north of the Ngang pass the country is administered, south of it Ly authority rests on garrisons (board). South of the Thạch Hãn lie the Cham plains of Châu Ô and Châu Lý, held by Champa.
No source we read dates a battle, a raid or a transfer here in the 1190s. The Hải Vân line of the later notes is not the frontier in 1200.
Who holds it
- Title
- A Ly frontier governor (not named) and Viet settlers' headmen; Cham lords on the south side
- Confidence
- low
Board; English Wikipedia (Ly dynasty on the cession of 1069)
Overlord
Dai Viet claims it; Champa's old claim is not dated to the 1190s.
How things stand that morning
A settled-but-thin march; no recorded war in force.
Wealth
Fish, salt, small rice plains; the roads over the range matter more.
Military
Posts and settlers; no numbers.
Threats
- A Cham push north (not dated)
- Raiders by sea
What the year holds
What happened next, if nothing in play changes it. Each event carries what it depends on and what would stop it.
- 1306Dai Viet gets Chau O and Chau Ly (the Hue plain) as the dowry of Princess Huyen Tran; the Hai Van line becomes the border.Depends on: Champa is still a kingdom in 1306 and agrees. Stopped by: A stronger Cham court or a different marriage.
Places of note
- Bo Chinh: Northern prefecture
- Nhat Le: Landing of Dia Ly
- Cua Viet: South end of the claim
Where the sources disagree
- Board: the Ngang pass is the practical border. We draw the claim to the Thach Han because the cession of 1069 gave Ma Linh as well; the real hold in 1200 is thinner than the colour suggests.
Evidence: The cession of 1069 is certain; every later position is inference.
On the map: The southern end at the Thach Han is our own reading; the campaign board has no southern limit.
Sources and studies
- Lý dynasty, English Wikipedia (read)
- OMNIA board notes for the Vietnam and Champa area (a lead, not a source)
Last revised 4 November 2026. Published 4 November 2026. Suggest a correction on the OMNIA Discord.