Well, let's see now.
Margret Thatcher -Started the Falklands war.
Indira Ghandi -led India in a war against neighbouring Pakistan which resulted in the creations of Bangladesh, formerly East Pakistan.
Catherine the great -Waged two successful wars against the Ottoman Empire.
Queen Mary (This one bears a long introduction)- was the first woman to be crowned Queen of England in her own right. Her reign was brief and troubled. Her marriage to Prince Philip of Spain provoked Parliamentary dissent and armed rebellion; the Spanish alliance later drew England into a disastrous war with France, ending with the loss of Calais - England's last French territory. Her religious intolerance is legendary. In 37 years Henry VIII had killed 90 heretics, Catholic and Protestant, burned at the stake; in four years Mary burned nearly 300 Protestants. Victims included blind men, pregnant women and Thomas Cranmer, Henry's Archbishop of Canterbury, who recanted his Protestantism seven times but reaffirmed it before his execution. The repression created a Protestant resistance which grew more resolute as the burnings continued. Protestants increasingly looked forward to the accession of Princess Elizabeth.
Tz'u-hsi -She commanded the violently anti-foreign secret society "The Boxers" to attack foreign legations in Peking; this siege lasted eight weeks. In return, a mixed foreign force of 19,000 troops battered its way in and captured Peking. Peking was looted, many Chinese people were tortured, raped and killed. Tzu-Hsi fled to Sian. Before fleeing, Tzu-Hsi summoned the emperor's concubines and told them to stay behind. One of them begged to be allowed to accompany the emperor. "Throw this despicable minion down the well!" She ordered the guards. The order was carried-out.(And she killed her own son to gain power.)
Elizabeth I - Elizabeth gave Queen Mary of the Scots refuge, then immediately betrayed her and kept her prisoner for nearly 19 years, then murdered her.
Queen Isabella of Spain -The Catholic queen was cruelly intolerant, encouraging the infamous Inquisition. In her lust to unify Spain and centralize power, Isabella drove out the Jews, Moors and Gypsies.
Shall I go on?