Is “Reviewed troops at Mengjin to test the waters” true?
attested in history
Records of the Grand Historian (Annals of Zhou) records that after ascending the throne, King Wu led troops across the Yellow River to Mengjin for a military review; eight hundred lords arrived unexpectedly, but King Wu deemed the time not yet ripe and withdrew.
King Wu of Zhou
In official histories, he is a decisive ruler who founded the Zhou dynasty, while in novels he appears as a benevolent monarch who relies on celestial immortals for aid.