making a chain unit

The only real example ive seen was in a map called worm war, which i studied but its really damn complicated, more so than what i need. Anyhow, I want to have one unit appear, move a short distance, have another appear and become attached to the first, and so on as they move forward. After that all they have to do is move in a straight line for a while. Id like to have individual segments be able to be killed without breaking the chain. The context this is in is a caravan exiting a cave one part at a time and moving across the better part of a map where players could kill any of the pieces without stopping the train

Just use a unit array and have each unit in the array follow the unit directly below it in the chain - then controlling the first unit will cause all the rest to follow.

Then have a trigger that takes a dying unit out of the array, bumps all the units above it in the chain down a notch and orders them all to follow the unit below them in the chain again.

lotta work but not hard as i thought to do, thanks

or try to figure out that Kodo Caravan from RoC campaign....they used alot of regions as i recall it called "bread-crums" or something like that and forced the units to move to the next region blabla....it's complicated :)

or do the ligatures array thingy...depends on what u need it for...

The Kodo Beast Caravan & Magical Wagon Caravan from WC3 and TFT used 'breadcrumb #' regions.