The US, as with all countries, helps others it considers to be in the right. War crimes are not commited merely because someone who disagrees with a certain policy says that it is so.
France
Germany
Weapons permit a greater degree of violence.
Supplying Allies with weapons
B. Supplying their troops with weapons and ammunition
The Taliban came about back during the Soviet occupation of Afghanistan, they were part of the resistance movement that fought against them Soviets to get them to leave the country. The CIA helped them do this by supplying weapons and money, oops.
Supplying Allies with weapons Fighting in Africa
India is already a nuclear power, and they have nuclear weapons on hand. They have already made the decision to "encourage" nuclear weapons, and presumably for increasing their own security.
A military is a part of a government. It is authorized to use lethal force, and weapons to defend and support the interests of a state or country.
From supplying the weapons of war to becoming the primary combatant.
Well their specialists in the use of/design of weapons, and usually they work for the government.
The United States of America was the country that developed the first nuclear weapons.