3-25. A selected Army headquarters may be designated as a JTF headquarters, joint forces land component headquarters (JFLC) or Army Forces (ARFOR) headquarters. This requires the designated Army headquarters to develop a JMETL. The Army headquarters commander crosswalks the JMETL with the current Army headquarters and subordinate unit METLs. Joint training manuals provide an overview of the joint training system (JTS), and assists in—