When moving units with 'When I move' triggers to attack, what is the order of resolution? Specifically, do 'When I move' triggers resolve before combat starts and before 'When I attack' triggers?

Ruling: When you move units, 'When I move' triggers go on the chain first and must resolve completely before entering showdown/combat. After the 'When I move' triggers resolve, you then enter showdown where 'When I attack' triggers occur.

Sequence:

• Declare move to battlefield
• 'When I move' triggers go on the chain
• Opponents can respond to these triggers on the chain
• 'When I move' triggers resolve
• Combat/showdown begins
• 'When I attack' triggers go on the chain
• Combat proceeds

Nuances:

• Units do not have Assault bonuses while 'When I move' triggers are on the chain, since showdown has not started yet
• Opponents can kill or remove units with reactions while 'When I move' triggers are on the chain, before combat starts
• If there are no 'When I move' triggers, combat starts immediately with no chain
• Even 'may' abilities ('When I move, you may...') still trigger and go on the chain; the 'may' choice is made at resolution
• You cannot start combat while another chain is ongoing