Nice way to control units over the radio chat in Arma. See below on video example how you can order a unit to move over the side chat radio.
VIDEO EXAMPLE
*Create unit ( player or AI ) name it ( bob )*Create a trigger
- make it a Radio alpha...,
- ON ACT. field put this code " bob sideChat "I need Help!"; message1 = "done" "
*Create a seccond unit
- make first waypoint and make it close to unit with order " MOVE "
- make second waypoint with order "SEEK AND DESTROY", speed "FULL", "AWARE" and in the condition put this code " message1 == "done" "