Call to Arms is a turn-based strategy game featuring board game-style military tactics. Players command armies by moving forces between regions and engaging enemy units to capture territory. The objective is to occupy all regions on the map. The game includes two historical scenarios: Europe 1942 and Scotland 1750. Matches support 2 to 4 factions, with each controlled by either human players or AI, competing in elimination-style warfare until one faction remains victorious.