Manual or Automatic attacks for oasis
I'm new to the game and I'm curious about the combat. I've been having the computer run my battles for me and it seems like there has to be a better way. I'm trying to occupy level 9 oasis and I was hoping with 1000 cats that I wouldn't lose any other troops (I sent in 1200 inf and 500 archer to help cats). I lost hundreds of each, but not any cats, when I took the oasis.
I've tried searching in these forums for guides on specifics of how combat works, so I can optimize my losses when taking forts/oasis. Does anyone have access to any such guide? I see various posts that say if you have enough cats, you don't need to send in any other troops, but I'm not sure the strategy to employ to guarantee that I don't lose any of my precious cats.
Any insights would be greatly appreciated!

Be well.