Where was Slifkins army?

"Not like the early ones (The ten tribes) who lightened from themselves the yoke of Torah (And only had 1800 people in Kollel) who Sancherev beat the living daylights out of them, but like the later generation of Chizkiya who fully burdened themselves with the yoke of Torah, they deserved to have miracles, like the ones who left Egypt and the ones who crossed the Jordan".   (Sanhedrin 94b)