red line

President Obama had called the use of chemical weapons there a “red line.”

When the president as commander in chief draws a red line, it is critical that he act if the line is crossed.

It was still the ‘red line’ period, right when things were tense.

In Syria he made chemical weapons a “red line,” and then folded in the face of public outcry and congressional opposition.

Would the red line be enforced if evidence proved that Assad had used chemical weapons?

A wavering red line licked its way to the canyon-edge on the east side, wiped out the grass, and died on the bald rim-rock.

They watched silently until the dot had crawled over the circle's red line, heading toward its center.

As soon as I reached the field I saw her horns and the red line of her back above the waving heads.

Balaclava was on his list, but he didn't even know it was there that his gallant regiment formed the thin red line.

Her rather nervous lips were thin and closed, so that they only appeared as a delicate red line.