What does the phraseology mean?
The result is that even the advocates of western intervention in Syria, such as Senator John McCain, proclaim that they are opposed to “boots on the ground”

What does "boots on the ground" mean?

Question

What does the phraseology mean?
The result is that even the advocates of western intervention in Syria, such as Senator John McCain, proclaim that they are opposed to “boots on the ground”

What does "boots on the ground" mean?

Answer

It means putting military troops in Syria.

Answer

He is referring to ground troops.