the game is basically like hoi4 (hearts of iron 4) but simple you can invade countries and even defend them and explore exploring is not invading
1 the military
the game is based on the location and time period the game starts at the year 1900
2 invading
invading a country is where you take territory from one another but exploring is where you can look into enemy or unclaimed territory for anything good like minerals and elements for making your weapons
3 upgrading defense on a country
you can arm a country that you wanna defend if you arm a country it takes an extra turn before you can fully invade the country
4 weapons
you can only get weapons from the time period you are in if you have scientist you can make certain weapons quicker than others will you can also exchange scientist and weapons and pretty much everything you have
5 industrializing
you can industrialize for military production
6 go ahead and make the first move