Mancala
Mancala is one of the oldest known games to still be widely played today. "Mancala" is a generic name for a family of two-player turn-based strategy board games played with small stones, beans, or seeds and rows of holes or pits in the earth, a board or other playing surface. The objective is usually to capture all or some set of the opponent's pieces. Versions of the game date back to the 7th century, and evidence suggests the game existed in ancient Egypt.
Board wargame
The actual subject matter of wargames is broad, and many approaches have been taken over the years towards the goals of simulating wars on a grand or personal scale. Some of the more popular movements constitute established subgenres of their own that most wargamers will recognize.
The oldest of the subgenres, and the one that still retains "iconic" status for board wargaming as a whole, it got its start with the first board wargame, "Tactics" (which, ironically, used a square grid; hexes were a slightly later innovation), and is still used in many wargames today.