Thank you for your quick answer.
I guess I should clarify some things:
I´m using c&c.net, skirmish mode and the RA editor to create my mission. The idea is, theres an island in the north, where the player beginns and a script-contolled enemy. In the south, another island with 3 computer-controlled-enemies. Does this make it a multiplayer-map? If so (and that´s the reason why "create team" doesn´t work), I´m more than willing to script it all and get rid of any AI. But how do I specify it as a single-player map? Is it the wrong approach from the get-go? Or the wrong editor?
What I did so far:
I put 2 Mammoth tanks on the map, owner USSR and set them in guard-mode. In the base-section I chose multi1 as the player (which sounds wrong,now that I think about it). Next, I went to the team-types section,named the team "mamm", set the waypoint to -1, put 2 mammoth tanks on the team-list,checked the prebuilt-team box (there are no other units on the map anyway) and gave the instruction "0 - move to waypoint #9".
In the trigger-section I named the trigger "mamm" as well,owner USSR, selected as event "elapsed time ... 2" and as action "create team...mamm".
Doesn´t work. Tried it with civilians,doesn´t work either.
I guess there is something inherently wrong with my take,but from reading in other (older) forums, I learned that some folks managed to do what I´m trying to do.Unfortunately without saying what they did to make it work.
Again, thank you so much for your answer.Maybe you can point me in the right direction or editor,since I couldn´t find some of the things you mentioned,for example the action "success" or JP-player.