Yu Da You (俞大猷) organised his war cart regiment to be able to functions at different tactical levels. The smallest military unit in Yu Da You's war cart regiment capable of independent operations was Xiao Ying (小營, small battalion), consisted of thirteen war carts.
Small Unit Tactics
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| Yu Da You's war cart formation (small) at its initial position, from 'Zheng Qi Tang Ji (《正氣堂集》)'. |
As the smallest operational unit in the war cart regiment, Xiao Ying was geared towards small scale engagement, namely to engage and defeat small numbers of Mongol skirmishers or raiders looking for plunder. As such, mobility and firepower were far more important than forming impenetrable defensive formation to defeat an enemy that frequently employed hit-and-run tactics and would not hesitate to retreat at the first sign of trouble. Xiao Ying did not form into wagon fort (Yu Da You thought that defensive formation should be left for larger unit) but deployed in checkerboard formation to maximise the firepower of Fo Lang Ji (佛狼機) cannons.


