An involuntary foreign service tour extension (IFSTE) is a procedure of the United States Army.
It is submitted by a soldier’s chain of command. Reasons include, but are not limited to, the following: to meet critical operational requirements; when a soldier is assigned to a unit which will deactivate or be reassigned; when a selected school date does not reasonably coincide with their date eligible for return from overseas (DEROS); completion of a military/foreign investigation and completion of administrative actions. Examples of administrative actions are: soldiers undergoing separation processing, MMRB, MEB, and/or PEB processing, compliance with host-country customs and regulations, or non-judicial punishment, court-martial, and so on.