Fire and fury: The impact of a Korean strike on Guam
North Korea's threatened attack could mean for the US and 6,000 American troops in the Pacific
When Kim Jong-un threatened to strike Guam, he threatened the heart of US interests in the Pacific region, a pivotal military base midway between the Korean Peninsula and the South China Sea.
The tiny ocean territory is home to Andersen Air Force Base, strategic US bombers, and 6,000 American troops and their families.
The US deploys its Terminal High Altitude Area Defense (Thaad) system around Guam. It's designed to shoot down any missiles aimed at US territories, so a North Korean missile could conceivably be destroyed before reaching its target. The ball would still be in Trump's court, however.
In July, North Korea test-launched a rocket with the potential to reach the US mainland. Experts believe the North already possesses medium-range missiles capable of delivering a nuclear warhead to much of South Korea and Japan, the New York Times reports.
A strike on Guam would likely be construed as a declaration of war on America – and US President Donald Trump has already promised North Korea it would respond with "fire and fury".
"Members of Donald Trump's administration have repeatedly signalled that they might be willing to use military force against North Korea – even if it inflicted on the Korean peninsula the worst human catastrophe in living memory," The Atlantic reports.
Quartz Media predicts a "nasty, brutish, and short" ground war could follow a North Korean strike on American interests.
"As long as China didn't get involved to help the North, the Kim-controlled Korean People's Army (KPA) would lose in a conventional ground war to the US and its allies within six weeks, a month, two months max," Robert E. Kelly, a professor at Pusan National University in South Korea, told Quartz Media.
The US could choose to respond with a surgical strike on North Korea's nuclear facilities, but it probably wouldn't work.
"North Korea's missiles and nuclear facilities are dispersed and hidden throughout the country's mountainous terrain. Failing to hit them all would leave some 10 million people in Seoul, 38 million people in the Tokyo vicinity and tens of thousands of US military personnel in northeast Asia vulnerable to missile attacks – with either conventional or nuclear warheads," The Independent says.
South Korea stocked up on "bunker-busting" missiles last year, Quartz reports, in part to take out North Korea's heavily protected nuclear operations.
But even if the North's nuclear capability were wiped out, Seoul would remain vulnerable to attacks from artillery, The Independent says.
A more worrying result of a Guam strike is that it would draw in not just the US, South Korea and Japan but Russia, China and many of their allies.
The Chinese President Xi Jinping would probably want to prop up the Kim regime if a conflict ensued, as China would fear "both a refugee crisis and US troops on its border".
In that case, Quartz Media suggests, it would "almost certainly amount to suicide" for North Korea and Kim's regime, while its enemies are likely to face "a costly and divisive invasion and aftermath".