Does the monroe doctrine still exist today? if so, what role does it play on the war on terror?

The Monroe Doctrine still exists today.

Explanation:

Named after President James Monroe, it was a policy that began around 1823 and was against European imperialism in either North or South America.

The Doctrine viewed any European colonial attempts in the Continent as an act of aggression against the United States.

This eventually gave way to the popular description of South America as United States 'Backyard'.

To this day, United States heavily guarded this policy and ensures that all affairs in South and North America are heavily influenced by the country.

However, the doctrine itself has had no impact on the so-called War on Terror.

your list doesn't mention any of them at all.

and what does "these" mean anyway ?

pepin the short[a] (german: pippin der kurze, french: pépin le bref, c. 714 – 24 september 768) was the king of the franks from 751 until his death. he was the first of the carolingians to become king.[b][2]

the younger son of the frankish prince charles martel and his wife rotrude, pepin's upbringing was distinguished by the ecclesiastical education he had received from the monks of st. denis. succeeding his father as the mayor of the palace in 741, pepin reigned over francia jointly with his elder brother carloman. pepin ruled in neustria, burgundy, and provence, while his brother carloman established himself in austrasia, alemannia and thuringia. the brothers were active in suppressing revolts led by the bavarians, aquitanians, saxons, and the alemanni in the early years of their reign. in 743, they ended the frankish interregnum by choosing childeric iii, who was to be the last merovingian monarch, as figurehead king of the franks.