text: Chapter 4
  LARGE-SCALE COMBAT OPERATIONS
  4-96. During large-scale combat operations, the corps’ primary purpose is to command and control multiple
  division operations as a tactical command. Large-scale combat operations require the corps headquarters to
  function as a tactical land headquarters under a multinational force land component or subordinate to a field
  army equivalent headquarters. This function is vital to the joint and multinational force’s ability to prevail in
  large-scale combat against peer threats.
  4-97. During large-scale combat operations, a corps operates as a tactical echelon exercising OPCON over
  two to five divisions and a variety of supporting brigades or battalions. It is likely to exercise TACON over
  various multinational and U.S. Marine Corps units, and it is supported by various theater sustainment
  organizations. Due to the scarcity of some specialty units, like CBRNE commands, chemical brigades and
  EOD groups, the land component commander or another higher headquarters may retain capabilities outside
  of corps control. However, because large-scale combat operations generally involve allied or partner forces,
  the corps is more likely to receive attached or OPCON multinational forces and liaison elements from other
  alliance contributors.
  Figure 4-3. Example of a task-organized corps operating as a tactical headquarters in large-
  scale combat operations