Depends on what you call a “war” since the last time the US declared war was in WW II.. In terms of military operations, a partial list would probably include:

Democrat Presidents: Bosnia, Haiti, Iran, Kosovo, Libya, Niger, Somalia, Syria, and Yemen.

Republican Presidents: Afghanistan, Cambodia, Grenada, Iran, Iraq, Libya, Pakistan, Panama, Somalia, Syria, and Venezuela.

It is outside the 50 year timeframe, but go back another 10 years and you have Viet Nam which caused more deaths than all the rest combined.

Seems balanced when you put them in a simple list like that, so it might not be obvious that the republican started wars cost many, many orders of magnitude more lives and treasure than the tiny actions attributed to dems.

https://news.ycombinator.com/item?id=48109360

> go back another 10 years and you have Viet Nam

Eisenhower was a Republican when he committed forces to Vietnam.