While in the town ambushed by Ceasars troops I ran ahead of them, hid in an ally, and ambushed them as they left town even though Ghost told me not to...

All went well got a cool helmet, and all...

Later (level 6) I got ambushed by two of Ceasars assassins... they killed me three times. Only way I could kill them was kiting them over frag mines to cripple there legs, slow them down, run ahead and shoot them with my rifle...

I don't know how many more of these ambushes I can handle... They are rough. Did I screw up by fighting them in that town, and starting a war with them to early?

Well the game is certainly a lot tougher than 3 took me a good two hours to beat a final boss, and I had to do it a cheap way.