Original sentence: It has been called the Westmoreland Field Manual because it had a faked signature from General William Westmoreland.It was labeled supplement B (hence "30-31B"), but FM 30-31 only had one appendix, Supplement A, during the 1970s.The January 1979 issue of CIA critic Philip Agee's CovertAction Quarterly produced a copy as well.The US Army Field Manual 30-31B is a forgery purporting to be a classified appendix to a US Army Field Manual describing top-secret counter insurgency tactics
Edited sentence: The January 1979 issue of Philip Agee's CovertAction produced a copy as well.The US Army Field Manual 30-31B, with what purports to be an appendix to FM 30-31, aka Westmoreland Field Manual (named after General William Westmoreland), is a faux classified US Army Field Manual purporting to describe top-secret counter insurgency tactics