Perhaps more important, it appears that allied troops have n't yet fully engaged Iraq's vaunted Republican Guard, which has been sitting just north of the Iraq-Kuwait border and is considered the most potent element in the Iraqi defense. It remains to be (seen) how much damage the allied air campaign was able to inflict on the Guard, and whether President Hussein will commit his most valued troops to a fight-to-the-death finish.  
 Verb: seen
Yes