Jha said this while seeking to set the record straight, a day after the BJP stalwart alleged that Nehru, the country's first prime minister, was reluctant to send army to Kashmir in 1947 even as Pakistani troops approached, but Patel, the then Home Minister, prevailed over him.
The comments by Advani in his latest blog quoting Field Marshal Sam Manekshaw from the interview given to Jha for his book stoked a potential controversy, days after the BJP leader claimed that Nehru had called Patel a "total communalist" for insisting on police action against the Nizam in 1948.
"Since my book has provided the ammunition for his salvo, I would like to set the record straight," Jha said in a statement.
Jha, however, noted that Advani has reproduced Manekshaw's interview with complete "fidelity" and that his conclusion that Nehru had differences with Patel over sending the army into Kashmir is also true.
"But it is not the whole truth. The real disagreement between them was not over whether to send the army in but when, and under what circumstances," he added.
However, Nehru appeared reluctant and felt the issue should be taken to the UN.
Referring to Manekshaw's claim in the interview, Advani said Lord Mountbatten called a Cabinet meeting soon after Maharaja Hari Singh signed the Instrument of Accession. This was attended by Nehru, Patel and defence minister Baldev Singh.
Manekshaw presented the "military situation" in the meeting and suggested the Indian forces be moved there.
