Ranked: 9 of the longest sniper kills of all time, from Vietnam to Ukraine

Ranstad was operating in a part of Kunar province, northeastern Afghanistan, where he used a boulder for target practice. He would take notes on different variables affecting his shots — such as the temperature and wind — after each one, the New York Post reported.

In January 2008, Ranstad spotted four enemy soldiers stood conveniently by the rock, the Post said. After missing with his first attempt, Ranstad hit one of the insurgents with his second shot, despite them being outside the range of his gun's scope, per the report.

Hathcock holds the Marine Corps record for the longest confirmed sniper kill shot, as Insider previously reported.

The sniper set the record in 1967 during the Vietnam War, and it's all the more impressive because he wasn't using a sniper rifle.

Hathcock got his long-range kill with a M-2 .50 caliber Browning machine gun, which could be fitted with a telescopic scope for use at extreme distances.

He is regarded as one of the deadliest snipers in the history of the Marines, with 93 confirmed kills to his name.

Perry, took out an insurgent 1.44 miles away while also serving during Operation Anaconda in Afghanistan, The Globe and Mail reported.

Perry's actions during the operation led to him receiving praise from the Canadian government, though it didn't specify details of any kills.

"From March 2 through 11, 2002, he operated his sniper team from the 3rd Battalion, Princess Patricia's Canadian Light Infantry Battle Group through extreme weather conditions," the Governor General of Canada's website says of Perry's service.

"Master Corporal Perry demonstrated impressive professionalism and dedication to duty through his valiant conduct while under direct and indirect fire and his actions helped ensure the success of the mission," it adds.

British soldier Craig Harrison is said to have had two kills in quick succession at a distance of 1.53 miles while serving in Afghanistan.

We Are The Mighty reported that Harrison spotted an enemy machine gun team in November 2009. Firing in six-second intervals, he fired five shots and got two kills.

Harrison completed 10 tours in a 23-year military career with the Blues and Royals regiment of the British Army, serving in Kosovo, Iraq, and Afghanistan.

But Harrison told the Veterans' Foundation earlier this year that the record caused him "nothing but misery" and that he continued to battle PTSD and suicidal thoughts.

In November, Ukraine claimed that one of its sharpshooters shot and killed an enemy soldier at a distance of 1.68 miles.

Its strategic command shared a video on Telegram that it claimed showed the hit, saying: "The occupier was eliminated by a precise shot of our commandos from a distance of 2710 m."

The distance is roughly equivalent to three times the height of Dubai's Burj Khalifa — the world's tallest building.