About 200 US troops have arrived in Israel to assist with logistics and aid coordination, various media outlets have reported.
The deployment includes personnel setting up a regional centre to facilitate the flow of humanitarian supplies into Gaza.
Aid trucks have been moving through Egyptian crossings in increasing numbers as the truce holds for a third day.
American forces are also expected to provide security and intelligence support to the multinational peace contingent.
The US move underscores Washington’s central role in sustaining the ceasefire and monitoring compliance on the ground.
