Translate the following English sentence to French:
"By Christmas, there were perhaps 100 and, by the spring, still only a fraction of the force it had been agreed should come was, in fact, in place."
À la Noël, il y en avait peut-être 100 et, au printemps, il n'y avait toujours qu'une fraction infime de l'effectif qui avait été promis.