In modern times? IDK, but historically female leaders tended to engage in more war as a way to legitimize their rule, whether instigator or not. Kosem Sultan, Queen Isabella of Spain, and Catherine de’ Medici to name a few, but to quote a Quartz article:

“In fact, between 1480 and 1913, Europe’s queens were 27% more likely than its kings to wage war, according to a National Bureau of Economics … And like Isabella, queens were also more likely to amass new territory during their reigns, found the paper’s authors, economists Oeindrila Dube and S.P. Harish.”