A “cavalry” of paramedics and EMTs from across the country loaded into over 50 ambulances at Fort Totten Park in Queens Thursday, joining the Big Apple’s battle to contain COVID-19 and treat the infected.

“We needed the cavalry to come, we needed the reinforcements to come,” Mayor Bill de Blasio told the dozens of emergency responders from states such as California, Ohio, Georgia and Mississippi.

“The fact that you’re willing to leave your hometown, leave your family, and come here in our hour of need I cannot thank you enough,” de Blasio said at the park, which was once home to a Union fort during the Civil War.