Specifically, I would like to know who the most recent European monarch (or monarchs, if they lived roughly at the same time) is that actively engaged in combat whilst reigning: that is, used a sword, gun, or any other weapon himself during fighting. I do not mean merely "commanded his soldiers in battle" as a general would.
For example, I am under the impression that Richard III actually fought on horseback with sword (and lance?) at the Battle of Bosworth Field in 1485, and was distinguished by his bravery. Surely, however, there must be a later example, at least from the Early Modern era.
Edit. This question is different from the older question, since the older question specifically did not require the monarch to use his weapon during the battle (the requirement there was to be an armed participant).