Though no president has ever acknowledged the legal validity of the 1973 War Powers Resolution, all have complied with part of it by sending reports on U.S. military operations by combat-equipped forces. There have been so many ongoing efforts in recent years that President Obama has combined them in biennial letters to Congress.
The latest says that U.S. forces are deployed
for operations in the following places: Afghanistan, Iraq and Syria,
Jordan, Turkey, Somalia, Yemen, Djibouti, Libya, Cuba, Niger, Cameroon, Red Sea, South Sudan, Kosovo, and against the Lord's Resistance Army. Sixteen!
Despite what candidate Trump said about America being overly involved abroad, I'd bet that the number of places will still be over a dozen a year from now, and the total of overseas forces is likely to be even larger than now. We'll see.