Let's see where I find the scriptures that fit in that scenario in Israel.
Zechariah 14:1-3
" Behold, the day of the LORD cometh, and thy spoil shall be divided in the midst of thee. For I will gather all nations against Jerusalem to battle; and the city shall be taken, and the houses rifled, and the women ravished;
and half of the city shall go forth into captivity, and the residue of the people shall not be cut off from the city. Then shall the LORD go forth, and fight against those nations, as when he fought in the day of battle. "
At the Armeggadon, the blood will go up that high at horse's bridle and it will stretch to 200 miles long. I think that the USA is obsolete ( useless ) and couldn't do anythin' to help much, because Israel is USA's ally while some other foreign countries are friends of USA, too ( for example : Lebanon ). Once the USA don't step in to help, God will step in to help Israel fightin' against nations. It will be interested to see what ADers has to say about this with their opinions/POV.