The use of a 22,000 pound Massive Ordnance Air Blast (MOAB) bomb, the largest conventional weapon in the United States military arsenal, will have no discernible effect in changing the course of the war in Afghanistan.
The bomb was delivered via an MC-130 transport plane, according to the Pentagon.
Stump says it was the first-ever combat use of the bomb, known as the GBU-43, which he said contains 11 tons of explosives.
General John Nicholson, the head of U.S. and global forces in Afghanistan, said the bomb was used against caves and bunkers housing fighters of the Islamic State in Afghanistan, also known as ISIS-K.
Following the MOAB (Mother of All Bombs) bombing over the Achin district of Afghanistan's Nangarhar province by the USA, the Indian political fraternity on Friday applauded the move, calling out to other nations to come together against terror.
The Pentagon says it dropped the MOAB in Nangarhar province at around 7:30 p.m. local time, to counter ISIS efforts to use bunkers and tunnels as defense mechanisms. "They used it on underground tunnels in Afghanistan", Gordon Chang, an East Asia security expert, said on CNN, adding that a target of the bomb could include North Korean tunnels "where a large part of the North Korean military has hidden itself".
Earlier, U.S. President Donald Trump dubbed the MOAB bombing as a successful event, saying the country is proud of its army.
"We must deny them operational space, which we did", Mr Spicer said.
USA forces took every precaution to avoid civilian casualties with this strike and will continue offensive operations until ISIS-K is destroyed in Afghanistan. The BLU-82 was used multiple times in the early stages of the war in Afghanistan, when USA forces were closing on Osama bin Laden in the mountains of Tora Bora on the Afghan-Pakistan border.
Even the smallest of the U.S. military's atomic arsenal, the B-61 at its minimum configuration, has an explosive yield roughly 30 times that of the MOAB. The bomb is guided by satellite to its target.
"Strategically, the strike had no impact on the war in Afghanistan where 40,000 Taliban fighters are regaining the ground lost over the last few years and crushing the USA trained - and - equipped Afghan army and police", he pointed out.
The statement further added that the strike used a GB-43 bomb dropped from a USA aircraft.
"We don't have a cost per unit" for the MOAB, Air Force spokesperson Ann Stefanek told The Daily Caller News Foundation.
There are 8500 United States troops in Afghanistan primarily split between counterterrorism operations and supporting the fledgling Afghan military.
Officials at the Afghan Defence Ministry said they were first alerted to Thursday's bomb through media reports.