US is probably putting it's military in place just in case PNC wants to incite violence and bring in the Cubans to assist them in installing a communist dictatorship in Guyana.
Dat US ambassador is a very intelligent woman. She don't tek eye pass from Granger.
Those US soldiers were in Essequibo for at least two years if not more. There are also Israeli soldiers in Guyana. There is a thread on GNI which addressed this issue in the past.