10 Dollars - Elizabeth II Battle of Guandu

The Battle of Guandu was fought in 200 AD along the Yellow River in northern China, a pivotal engagement in which Cao Cao's forces defeated the numerically superior army of Yuan Shao — a victory that effectively ended Yuan Shao's bid for dominance over the fragmented Han empire. Cao Cao's tactical use of a fortified supply line at Wuchao, which he personally raided and burned, collapsed his opponent's logistics and morale simultaneously.

Cook Islands issued a substantial run of large-format silver pieces in the early 2000s commemorating ancient battles, largely distributed through European and Asian coin dealers rather than through any domestic circulation channel.