We're seeing it today as the situation with North Korea unfolds.

Admiral Mullen blames the violence on N. Korean efforts to blackmail the world for more aid.

Others say that there's a new crazy leader.

The truth is, the US is holding war games with S. Korea, very close to North Korea (update: The war games are being held in an area that has long been under dispute, that N. Korea claims to be it's territory. Putting war ships there, in territory N. Korea claims to possess, is tantamount to declaring war.).

That is why North Korea is responding... RESPONDING to having been PROVOKED by the US and S. Korea.

What are the reasons for such provocative action by the US?

Obama could use a "good" war, that appears fully justified.

The US military industrial complex sees the writing on the wall, that they're being targeted for 10-25% budget cuts and that Iraq and Afghanistan have lost their cachet as just wars with the American people. The rest of the world knows what a crock the claims that there are good reasons to be there are.

I'm sure there are more lies that will soon be exposed.

Don't be fooled. This confrontation was intentionally started by US and S. Korean provocation.

Lost lives are the fault of the S. Korean leadership, the US military and Obama.

Update:

as Chris Rushlau provided in his link below, the war games are being held in an area that has long been under dispute over whether N. Korea or S. Korea owns it. That makes the war games all the more provocative and confrontational. The US is, apparently, helping S. Korea to push the envelope. I think we can assume that the key players are all very much aware of this.

see a second update above, in italics.

Just a map of Korea, not of the war games.