Zhao Guang was very clear that there were definitely a large number of spies in his territory.
The larger the territory, the more prevalent these spies and the more diverse the thoughts of the people.
To massively expand the army without being infiltrated by outsiders was simply impossible. All he needed was to hold on to the main body and ensure there were no issues at the top.
If it really didn't work out, he could just use those who had signed slave contracts.
There were so many territories, each with its own army, yet he had never heard of any problems arising within them.
The people behind those spies probably hadn't thought about how they could affect his army.
At most, they would try to obtain some information, but Zhao Guang didn't care for regular information.