No country uses grenades as their primary arm - rifles are the primary armament of any military.
Germany used the Grenade first in WW1 So germany was the first county to use the grenade
Surprisingly, grenades are older than guns- the first was probably from around the year 750 AD. Not 1750, but 750. See the link below.
Yes, hand grenades were widely used in WW1
Grenades were used to blow things up a little bit ovious that one
Grenades are used when you know where the enemy is but they don't know where you are so they make the perfect surprise.
There were many types of grenades throughout modern warfare history such as stick grenades, impact, timed, stun etc. The first type grenade goes back over 1000 years in China, it was a simple container, with a fuse, which was filled with gun powder. This would be one of the first prototype to the modern day grenade.
There are three kinds of grenades. Antipersonnel grenades are used against people. There are fragmentation grenades, which break up when they explode and scatter, at high speeds, pieces of metal which injure or kill whoever you used the grenade against. There are also distraction grenades which create a loud noise and bright flash of light to stun the target...while they're stunned, you can rush in and take them into custody. (SWAT teams love distraction grenades.) Smoke grenades produce thick clouds of smoke. There are white smoke grenades used to conceal troop movements, and colored smoke grenades used for signaling. Product-delivery grenades come in two varieties. The first are White Phosphorous (willy-pete), which is an incendiary agent. The other are Tear Gas grenades.
The Byzantine Empire used fire bombs vaguely similar to grenades as early as the late 700's AD. The first exploding grenades that were similar to modern ones were invented in China in the 900's.
Tin and explosive power that is no longer used.
They can be thrown at the target, or used to make boobytraps.
Mortars, artillery shells especially shrapnell, hand grenades and rifle grenades.