The Rapier provenance and purpose:
https://www.kongernessamling.dk/en/r...ghthood-sword/
Below I attached a photo of Christian IV riding sword that he wore when entering the Danish phase of the 30 year war as Duke of Holstein for the protestant cause.
Not starting of very well lousing the battle at Lutter am Barenberg, 27 August 1626. Below his riding sword we see the Danish line break to Tilly's Catholic army: