Wally Wood has gotten the attribution for writing the first three issues, just as Jack Cole has for all his Plastic Man stories, but with no better reason than that he wrote some of his own work elsewhere. Could Wood have brought the concept and plots to Gold Key? Very possible, but who can say? The "new writer" finally identifies the invaders as extraterrestrials, which supposedly proves a point, but he doesn't do it in issue 4, the first with the new artists; he works his way up to confirming the fact in #5.
Here are tiers from issues 3, 4, and 9. Do you notice a similarity in writing style? There's also Dorfman's use of captions beginning with "As" quite a bit, and at least one siren going "Howeee."
I'm not sure exactly how the Wood/Adkins art was broken down: if one did layouts, one complete pencils, one complete inks; or more likely nothing so clearcut. And of course others may have helped. The inks on the remaining issues seem to me to match up with Mike Peppe's on, say, Mike Sekowsky's pencils on Man from U.N.C.L.E. Most often Roy and Peppe worked as a team, like Andru and Esposito—but the only signature in the series, on the splash page of #10, is Roy's alone.
Total War written by Leo Dorfman
|July/65||1||Target: America||a: Wally Wood & Dan Adkins|
|Oct/||2||Sneak Attack||a: Wood & Adkins|
|Breakthrough||a: Wood & Adkins|
M.A.R.S. Patrol Total War written by Dorfman
|Sept/66||3||Operation Copperhead||a: Wood & Adkins|
|Oct/67||4||Operation Deep-Freeze||p: Mike Roy i: Mike Peppe|
|May/68||5||Mystery Beachhead||p: Roy i: Peppe|
|Aug/||6||Operation Snake-in-the-Brass||p: Roy i: Peppe|
|Nov/||7||The Death Wind||p: Roy i: Peppe|
|Feb/69||8||Tomorrow Is Doomsday||p: Roy i: Peppe|
|May/||9||City under Fire||p: Roy i: Peppe|
|Aug/||10||The Dragon's Teeth||p: Roy i: Peppe?|