Europe and North America are the only continents that have no territory in the southern hemisphere.
Large parts of Mexico were taken over by the US under the doctrine that it is the manifest destiny of the US to extend its territory across the continent of North America, from sea to shining sea.
North America, Europe, and Asia all extend north from the equator.
Yukon Territory is in Canada. This is part of North America.
The continents that do not extend into the southern hemisphere are North America, Europe, and Asia.
north America
Alaska connects to North America through Canada's Yukon Territory
The continents solely located in the Northern Hemisphere are North America and Europe. While parts of Asia and Africa extend into the Southern Hemisphere, North America and Europe are completely situated above the equator. Additionally, the majority of Greenland, an autonomous territory within North America, is also entirely in the Northern Hemisphere.
Except for an early skirmish in territory that was claimed by both Mexico and the US, North of the Rio Grande, in Texas; most of the fighting occurred on Mexican soil. The US sent troops over land from the North and by sea to Vera Cruz. America also sent expeditions into the Mexican Southwest and California.
North America (all of it)
Alaska
Spain had the most territory in North America in 1790. However, in the next few decades, it would be the UK and then the US.