The wars the US is waging in the Middle East fulfil none of the definitions of guerrilla or "terrorist" war. The US simply calls them that so that it can deceive the American people and circumvent constitutional safeguards in order to wage wars of aggression.
Source: America's wars in the Middle East are not 'Wars on Terror,' they are conventional Wars of Aggression
For those fighting and dying there – only Death is real. For the American people, Middle East Terrorism is a total fabrication.
A standard definition of War is that it is “a conflict carried on by force of arms”
We all know the old face of war in the classical days, where two sides in different coloured uniforms lined up and charged at each other until the sun set. Whoever had the most soldiers standing at the end of the day was the winner and they took over the territory of the losers. It was all about territory and redrawing borders.
This kind of warfare held up until around the time of the American Civil War. Since then lines have become blurred.
A standard definition of Guerrilla War is that it is “the use of hit-and-run tactics by small mobile groups of irregulars operating within a territory controlled by a regular military”.
By the the time of the Anglo-Boer War (circa 1900) the Boers had invented Guerrilla Warfare, where small bands went in and did as much damage as possible using what they had.
It was very effective. — An online register lists the names of 293,209 British Soldiers who had to be brought in to wage the war. However, adding in all the other Colonials it was probably closer to 500,000 who were needed to subdue about 30,000 rag-tag South African Boers.
Eventually the British found a very workable solution. They rounded up all the women and children remaining on the farms (who had been feeding and sleeping the rebels every night) and put them all in concentration camps. Their suffering was extreme. The men had to give up.
Guerrilla warfare is not about capturing Territory, but about demoralisation, damage to infrastructure, and forcing vast numbers of very expensive regulars to guard infrastructure.
A standard definition of Terrorism is that it is “the use of violence and intimidation in the pursuit of political aims”