Board Thread:General Discussion/@comment-1359322-20141227105806/@comment-24555623-20141227125245

Since there seems to be no name for the first arcs, but we can use the volumes to help us figure them out. These is what I manage to compile. Further breakdown/grouping is possible.

Introductory Arc: Vols. 1-2 (9 chapters) - Episodic chapters with no common denominator (that I could see) except for Tatsumi's develpment up to the death of Sheele.

The Tree Beasts Arc: Vol. 3 (5 chapters)

The Jaegers Arc: Vol. 4 (5 chapters)

The Attack from Team Stylish Arc: Vol. 5-6 (8 chapters) - could be included in Jaegers Arc.

From Ch. 28 forward, the arcs are named

Religious Organization Battle Arc: Vol. 7-9 (28-53, 16 chapters) - arc name stated at end of ch. 28. No other arc name is mentioned before ch. 43. Further breakdown could be possible, but I am counting from the moment they receive the mission ot kill Borick until they finally do so. (From firs mention of arc name to next mentioned arc named)

Empire in Chaos Arc: Vol. 10 - present (chapter 44 forward) - arc name stated at end of ch. 43. "Empire Capital in Chaos Arc" is mentioned at the end of chapter 49. I don't know if is a new arc or a different translation of the same arc. I'm assuming the latter. I haven't seen any other arc named.