Rhino 21 is a marine rescue unit in Aliens: Colonial Marines

Rhino 2-1 is a callsign for a marine search and rescue unit in the game Aliens: Colonial Marines

Sent to check the situation on the USS Sulaco.

In a communication to Rhino Actual, it reported that both Conestoga class ships have been destroyed, as well as heavy causalities, in the hundreds, after which contact was lost.