Sikelgaita frequently accompanied Robert on his conquests. She conducted the siege of Trani (1080) while Robert moved against Taranto. Although at first she tried to persuade him not to attack the Byzantine Empire, she nevertheless brought troops and accompanied him on his campaign against them. At the Battle of Dyrrhachium in 1081 she was on the field in full armour, rallying her and Robert's troops when they were initially repulsed by the Byzantine army and were in danger of losing cohesion. As a middle-aged woman with a large family, it is unlikely that she was a combatant although obviously close to the action, probably in a sort of command post.[2] According to the Byzantine historian Anna Comnena, she was "like another Pallas, if not a second Athena," and, in the Alexiad,[3] Anna attributes to her a quote from the Iliad.
https://en.wikipedia.org/wiki/Sikelgaita
Sikelgaita is described as a woman of immense build and colossal physical strength, proving to be the perfect wife for Robert, scarcely ever leaving her husband’s side—a close political aide and in battle equal in courage to both her husband and step-son who were named as the two outstanding warriors of their age...According to Byzantine historian Anna Comnena, “Gaita” saved the day, a second Pallas, if not an Anthene, when Sikelgaita saw soldiers running away she demanding fiercely, in her very powerful voice, how far will you flee? Stand and fight like men. When they continued to run she grasped a long spear and at full gallop rushed after the fugitives, on seeing this they recovered themselves and returned to fight.
https://www.medievalwomen.org/sikelgaita-heiress-of-salerno.html
Æthelflæd...Often described as England’s greatest woman general playing a major role fighting off renewed Viking attacks she was praised by Anglo-Norman chronicler William of Malmesbury, as ‘a powerful accession to [Edward's] party, the delight of his subjects, the dread of his enemies, a woman of enlarged soul’ who ‘protected her own men and terrified aliens’. In her eight years in power Æthelflæd presided over the construction of a chain of fortresses across the kingdom, led troops against the Vikings, built forts, endowed churches, issued charters, dealt with Irish-Norwegian pressures, received the submission of the men of York, established garrisons in Hereford and Gloucester, repaired the old walls of Chester, united Mercia and reestablished Tamworth as it’s capital. Described as Britain’s greatest woman-general she was the military strategist and most brilliant tactician of her time and is “among the few English women who in any period have permanently influenced the course of history”.
https://www.medievalwomen.org/aeligthelflaeligdnbsplady-of-the-mercians.html
Boudica...She was almost certainly a warrior long before the Romans got carried away with their tax-collection and decided that a bit of rape and pillage was a good idea. From all we know of the British tribes of the time, leadership of the armies was based on merit, which is to say fighting ability, not on the redness of your hair or the neatness of the pointy, tassly things on the Raquel Welch-style furry bra that you, of course, (didn’t) wear into battle. This only surprises people who have fallen for the Roman myth, carried down to the present day, that women can’t fight in battle.
If you read deeper into classical and Irish Celtic histories, you will find that women commonly ran the warrior schools and if you want personal experience, I can recommend nothing so heartily as taking up dark age/Celtic battle re-enactment.
https://www.scotsman.com/lifestyle-2-15039/exploding-the-boudica-myth-1-1381411
Shield Maidens...There are few historic attestations that Viking Age women took part in warfare, but the Byzantine historian John Skylitzes records that women fought in battle when Sviatoslav I of Kiev attacked the Byzantines in Bulgaria in 971.[5] When the Varangians (not to be confused with the Byzantine Varangian Guard) had suffered a devastating defeat in the Siege of Dorostolon, the victors were stunned at discovering armed women among the fallen warriors.[5]
https://en.wikipedia.org/wiki/Shield-maiden
Fu Hao is known to modern scholars mainly from inscriptions on Shang dynasty oracle bone artifacts unearthed at Yinxu.[6] From these inscriptions and from the presence of weapons in her tomb, it can be determined that Fu Hao was a general in charge of several military campaigns for the Shang Dynasty.[7]
In her military role, she was responsible for conquering enemies and neighbors of the Shang Dynasty. [8] The Tu-Fang had fought against the Shang for generations until they were finally defeated by Fu Hao in a single decisive battle. Further campaigns against the neighbouring Yi, Qiang and Ba followed; the latter is particularly remembered for being the earliest recorded large-scale ambush in Chinese history. [9] With up to 13,000 soldiers and important generals Zhi and Hou Gao serving under her, she was the most powerful Shang general of her time.[10]
This highly unusual status is confirmed by the many weapons, including great battle-axes, unearthed in her tomb.[4]
While Fu Hao's achievements were notable and unique, other women in this period were also active in military roles; in a similar manner Fu Jing was also thought to have served in the military based on the presence of many weapons and military equipment in her tomb. Oracle bones also revealed records of hundreds of women participating in the military during this era. [11]
https://en.wikipedia.org/wiki/Fu_Hao
Cynane...Not only was she Alexander's sister but commanded a third of his army and fought to defend his kingdom
https://en.wikipedia.org/wiki/Cynane
Lady Trieu led her troops joined her brother's rebellion, soldiers of Trieu Quoc Dat made her leader because of her braveness. When she went to battles, she usually wore yellow tunics and rode a war-elephant. She proclaimed herself Nhụy Kiều Tướng quân (The Lady General clad in Golden Robe).
https://en.wikipedia.org/wiki/Lady_Tri%E1%BB%87u
If you bother to look, I'm sure you can find more.