I'm meandering towards a particular word that sounds somewhat similar to this one and yesterday's - and all have a martial aspect to them.
"Huzzah!" was once a battle cry. It was also used something like 'hooray' - and modern usage is probably something in between, albeit more as a joke/archaicism than anything else.
As a battle cry, its origins are debatable, although - again! - it has been claimed to have come to Europe from as far back as the invading Mongols in the 13th century. (A little too tempting to link it up to yesterday's hussar, maybe.)
In any case, it was clearly used by the British military at some point, in a similar manner to
'banzai'. Except, well, British, and not Japanese.
Where did I encounter this word? Someone mentioned it after the last one.