I saw this particular show. And I have seen only a couple a shows in the series.
To elaborate, after the US downed 11 Russian jet fighters, the Russian military decided to invade Mariputol. A spy in the inner circles of the Kremlin. told the Americans of the plans, so Ukraine and American advisors reinforced the city. The reinforced Ukranian-American force routed the Russian attack, killing a few hundred Russian soldiers. Killing only a few hundred sounds as if this was a regiment-sized offensive, nothing as grand as suggested in the show.
Not only did the US sell out Ukraine in the negotiated agreement, when the Russian president also asked at the last moment for the US to apologize, the American president refused and instead he and Madam Secretary gave up the name of the American spy. The spy had been placed in the Kremlin and managed by Madam Secretary's husband, who was personally close with the spy. No sex for Madam Secretary for a week or so.
And there is the part where the female Russian president is revealed as having murdered her husband, the prior Russian president, a true Russian hero.
This show is too bizarre and absurd for me. It reminds me of the black and white serials I watched as a young kid. Far better to watch Homeland IMO, yet it too is becoming absurd. An ISIS cell is targeting Berlin for a sarin gas attack, and they are aided by an American double agent. However, the psychotic Carrie is on their trail.