Setting up the Timeline track
Players will place a Timeline token on the track for each of their units at the start of the game, based on each unit’s starting Timeline value. If more than one of your units is placed on the same space of the Timeline, stack the tokens on top of each other in your preferred order. Units on top of the stack will act before units underneath.

Player A has built a squad featuring the RX-78-2 Gundam (A), the RX-77-2 Guncannon (B), and the RX-75 Guntank (C), while player B is using Zeong (D), a Zaku II: Minelayer (E), and an MS-05B Zaku I (F).
Player A begins by placing each of their Timeline tokens on the Timeline track based on each unit’s starting Timeline value. In this case, they have one unit each starting on spaces one, two, and three of the Timeline.
Player B begins the game similarly. They have two units with a starting Timeline value of two, however, so they stack the corresponding Timeline tokens in whatever order they prefer. Here, they’ve put the Zaku II: Minelayer on top of the Zaku I, meaning that the Minelayer will be activated before the Zaku I.
The game begins with the player whose unit(s) has the lowest starting Timeline value. In this instance, both players have a unit with a starting Timeline value of one, so they each roll one attack die and the player with the higher roll will play first.