No country uses grenades as their primary arm - rifles are the primary armament of any military.
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.
Yes, hand grenades were widely used in WW1
many countries
Tin and explosive power that is no longer used.
They can be thrown at the target, or used to make boobytraps.
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.
While many countries use Teriyaki sauce in their cuisine, it was originally used in Japan. The Teriyaki sauce is primarily used for marinades and can be seen in foods like Teriyaki beef.
Mortars, artillery shells especially shrapnell, hand grenades and rifle grenades.
There are a large number of countries using the PAL system - Wikipedia has a map of the world showing which countries adopt this system for TV. See related link for more info.
Swahili is primarily spoken in Tanzania and Kenya, as well as parts of Uganda, Rwanda, Burundi, and the Democratic Republic of Congo. It is also one of the official languages of these countries.
Sesame oil is an edible vegetable oil produced from sesame seeds. The sesame seeds are primarily grown in developing countries. The seeds are then used to make the oil.