The problem was that Panama technically belonged to...

The problem was that Panama technically belonged to Colombia, which refused to sign a treaty leasing it to the United States. So Roosevelt sent a gunboat filled with marines down to Panama, just on the off chance that a revolution might suddenly break out, and darned if one didn't, two days later. Not only that, but the leaders of the new nation of Panama-talk about lucky breaks!-were absolutely thrilled to have the United States build a canal there. 'Really, it's our pleasure,' they told the marines, adding, 'Don't shoot.'