11.1.3 - Multiple Charges
Core Rules, p. 30
When declaring a charge, you may select multiple charge targets for the charge move. Any unit selected as a charge target may make Reactions such as Overwatch if applicable.
The multi-charge will succeed only if the result of the charge is enough to end their charge move within ½" of all targets selected for the charge move.
If the charging unit cannot end its move within ½" of all targets it declared, the charge is failed (see 11.1). This counts as a disordered charge if successful (see 11.1.4).