Since ancient times, sending the troops has been a matter of consuming military provisions.
As the Duke Residence's three hundred thousand soldiers were always closely watched by the Emperor, their food and military supplies were never enough and they basically lived on a thrift.
Ever since the Emperor fell ill for a long time and the Crown Prince gained power, the military provisions of the Duke Residence were not as tight as before. However, with no silver in the national treasury, it was just slightly more relaxed.
Recent times, the three hundred thousand troops under the Duke Residence only have reserves of military provisions for three months.
When marching, the troops naturally need to move supplies. As Zhou Che moved stealthily, he not only took away supplies for one hundred thousand troops but also took a month's worth of spare military provisions.