Taken from the online comref:
unitArray join group
Operand types:
unitArray: Array
group: Object or Group
Type of returned value:
Nothing
Description:
Join all units in the array to given group. Note: total number of group members must not exceed 12. Note: This function is unsupported in MP in version 1.33 and before.
Example:
[unitOne, unitTwo] join player
:beat: *Gets Shot* :beat: