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As with most ancient civilizations, Rome's military served the triple purposes of securing its borders, exploiting peripheral areas through measures such as imposing tribute on conquered peoples, and maintaining internal order. From the outset, Rome's military typified this pattern and the majority of Rome's wars were characterized by one of two types. The first is the foreign war, normally begun as a counter-offensive or defense of an ally. The second is the civil war, which plagued the Roman Republic in its final century. Roman armies were not invincible, despite their formidable reputation and host of victories. Over the centuries the Romans "produced their share of incompetents" who led Roman armies into catastrophic defeats. Nevertheless, it was generally the fate of the greatest of Rome's enemies, such as Pyrrhus and Hannibal, to win early battles but lose the war. The history of Rome's campaigning is, if nothing else, a history of obstinate persistence overcoming appalling losses.

What could be considered a trait of Rome's military campaigns?
Answer: obstinate persistence
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In 1937, the Empire of Japan started a full-scale invasion of China after invading Manchuria in 1931, beginning the Second Sino-Japanese War (often considered a theatre of World War II). Their troops occupied Nanjing in December and carried out the systematic and brutal Nanking Massacre (the "Rape of Nanking"). Even children, the elderly, and nuns are reported to have suffered at the hands of the Imperial Japanese Army. The total death toll, including estimates made by the International Military Tribunal for the Far East and the Nanjing War Crimes Tribunal, was between 300,000 and 350,000. The city itself was also severely damaged during the massacre. The Nanjing Massacre Memorial Hall was built in 1985 to commemorate this event.

When did Japan invade all of China?
Answer: 1937
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At birth, Victoria was fifth in the line of succession after her father and his three older brothers: the Prince Regent, the Duke of York, and the Duke of Clarence (later William IV). The Prince Regent and the Duke of York were estranged from their wives, who were both past child-bearing age, so the two eldest brothers were unlikely to have any further children. The Dukes of Kent and Clarence married on the same day 12 months before Victoria's birth, but both of Clarence's daughters (born in 1819 and 1820 respectively) died as infants. Victoria's grandfather and father died in 1820, within a week of each other, and the Duke of York died in 1827. On the death of her uncle George IV in 1830, Victoria became heiress presumptive to her next surviving uncle, William IV. The Regency Act 1830 made special provision for the Duchess of Kent to act as regent in case William died while Victoria was still a minor. King William distrusted the Duchess's capacity to be regent, and in 1836 declared in her presence that he wanted to live until Victoria's 18th birthday, so that a regency could be avoided.

When did George IV die? 
Answer:
1830