John Watson, 35, created a "murder checklist" before he attacked fellow soldier and love rival James Dicks.
He waited for the victim to leave his ex-partner's house in Windsor, Berks, before binding his wrists with cable ties and forcing him into the back of his car.
Watson was found guilty of attempted murder last month at Reading Crown Court.
He was convicted of one count of kidnap and plead guilty to one count of possession of an offensive weapon in a previous trial in October last year.
Watson was acquitted of a further count of possession of an offensive weapon.
Daniel Fugallo, prosecuting at Reading Crown Court, said: "On the fourth of May last year at about 7.30am a man called James Dicks left his girlfriend's house in Windsor and walked to a nearby yard where he had left his car.
"As he approached his car Mr Dicks heard his name being called and he turned and he saw this defendant John Watson.
"Mr Dicks knew John Watson well, he knew that Mr Watson was the estranged husband of his girlfriend and he knew that Mr Watson harboured ill feelings towards him because of this relationship with Mr Watson's estranged wife.
"But Mr Dicks did not know what Mr Watson, this defendant, had been planning in the days leading up to the fourth of May.
The defendant had moved from the family accommodation he had with his wife and their two daughters to Pirbright Barracks in Surrey.
He drove his black Vauxhall Insignia car and waited for his former friend to walk to his car at a car park in Camm Avenue, Windsor, the court heard.
Mr Fugallo said: "The back seats of his car were folded down, they were covered and lined with bedding. Inside the car as he set off was a roll of cling film and a very large number of plastic cable ties.
"When Mr Dicks arrived that morning on foot and as he called Mr Dicks' name and Mr Dicks turned and saw Mr Watson who had the folding serrated saw unfolded in his hand.
"Mr Watson took out some of his cable ties and ordered Mr Dicks at knifepoint to tie himself up and get into the back of Mr Watson's car.
"But Mr Dicks refused to do what he was told, even when the defendant came at him with his folding saw.
"Instead he fought for his life," Mr Fugallo continued.
"He was at one point forced at knifepoint into the back of Mr Watson's car and tied up in cable ties and even driven a short distance to another nearby car park.
"But Mr Dicks carried on struggling, carried on fighting for his life and he was till struggling and fighting in that second car park when police officers, called by concerned members of the public, came and intervened and arrested Mr Watson."
The court heard that both men were attached to the Household Cavalry regiment based at Combermere Barracks in Windsor and lived with their wives and children at the barracks before their respective marriages broke down.
"The two couples knew each other through the connection Mr Watson and Mr Dicks had with the Army and there was some socialising between the two couples.
But over the course of 2015 both marriages experienced difficulties," said Mr Fugallo.
"By the end of 2015 both marriages had broken down and in early 2016 James Dicks and Mr Watson's wife, Lynsey, started a relationship - by that time Mr Watson himself was no longer based at the Combermere Barracks in Windsor."