These games are not for everyone, but there is an incredible Ageod deal at Bundlestars at the moment
$2.50 gets you Alea Jacta Est +4 DLC campaigns/scenarios, Pride of Nations + 4 DLC campaigns.
$5 is Tier 1 + Civil War II+ DLC, Revolution Under Siege Gold, Rise of Prussia Gold
$7 is Tier 1+2 + To End All Wars + DLC and Thirty Years War
The Ageod game engine is pretty old these days, but they cover periods of history no one else does, so if you want to get your strategy gaming fix for a particular time these are your best bet.
Alea Jacta Est is a good Roman Civil War game. Pride of Nations is a slog, but the DLC has some great 19th century scenarios you won't find anywhere else like the Indian Mutiny.
Revolution Under Siege is pretty much the only Russian Revolution strategy game ever made. Ditto with the Thirty Years War.
These normally retail for $20 a pop, so there is over $100 worth of games there for $10.