Countries in europe were very proud of themselves and would defend their country as well as they could. this is known as

When having pride of a certain country, it is called nationalism. 

Too much nationalism can cause problems, one of the causes of WW1 was nationalism. 

I'd say its patriotism.

patriotism: love for or devotion to one's country.

i was going to say nationalism but the dictionary definition of nationalism (nationalism: patriotic feeling, principles, or efforts) is basically referring back to patriotism, so :-)

The adams apple, or laryngeal prominence. is a feature of the human neck, and is the lump or protrusion that is formed by the angle of the thyroid cartilage surrounding the larynx seen especially in males.