North Korea by the Numbers: 10 Facts About Kim Jong Un's Rogue Nation As It Threatens to Attack the U.S.

President Donald Trump said Thursday that China is preventing the U.S. from resolving tensions with North Korea's Kim Jong Un "with a friendly solution" by allowing oil to be sent to the isolated nation threatening to blow up American cities and military bases.

Trump said in a Twitter message as he vacationed at his golf course in Palm Beach County in Florida that he was "very disappointed" in China for allegedly selling oil to North Korea despite United Nations sanctions against Kim's government. The tweet came after South Korean media outlets reported that satellites had captured Chinese ships providing oil to North Korean vessels. The tweet read, "Caught RED HANDED - very disappointed that China is allowing oil to go into North Korea. There will never be a friendly solution to the North Korea problem if this continues to happen!"

RTX3YP9C Attendants of the 5th Conference of Cell Chairpersons of the Workers' Party of Korea (WPK) hold a meeting to accept a pledge for North Korean leader Kim Jong Un, in this photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang December 26, 2017. Reuters

Kim, who took over from his father, who ruled after his father, has exchanged heated words with Trump for much of 2017, with both world leaders threatening war and military action. Kim is known for overseeing a brutal, secretive regime that has seen his people go hungry while paying for one of the world's largest standing armies.

Want to know more about North Korea's military threats? Newsweek put together 10 facts about the reclusive nation to help explain whether Kim is bluffing or really preparing to strike the U.S. mainland or its military bases across Asia. 

1. North Korea has carried out roughly 100 ballistic missile tests since 2011, when Kim took power, as well as multiple underground nuclear tests.

2. The Kim regime is believed to have about 20-25 nuclear warheads.

3. North Korea's latest test of its new Hwasong-15 ICBM in November hit an altitude of 4,475 kilometers, or about 2,780 miles, higher than the International Space Station. It likely has a potential range of 13,000 kilometers, or 8,100 miles, meaning it could strike anywhere in the U.S. mainland. 

4. Despite high rates of poverty, North Korea spent about $3.5 billion every year on military expenditures from 2004 to 2014.

5. A North Korea nuclear attack could result in 2.1 million deaths in Tokyo and Seoul alone.

6. North Korea's military has about 1,300 aircraft and nearly 300 helicopters.

7. Kim's military also has 430 combatant vessels, 70 submarines, 4,300 tanks and 5,500 multiple-rocket launchers.

8. There are about 28,500 U.S. troops stationed in South Korea, making them especially vulnerable to a North Korean attack.

9. North and South Korea are divided by a closely guarded demilitarized zone.

10. Roughly 780 North Koreans fled to South Korea this year, about a 13 percent drop from 2016.