After the creation of the theocracy the government would conscript and train roughly 1 Million troops or roughly 2.3% of the population into the military, using these troops we would being to build up and mobilize troops and other equipment along the tennessee border in preperation for a major blitz across the border, when the invasion begins we would launch a major offensive across the border focusing on capturing chattanooga and knoxville first before launching a full offensive inwards during the middle of the night, despite tennessee having predicted this and gathered some forces the numerical superiority and massive thrust forwards all at once would overwhelm their nation allowing us to gain major ground, with the intiial ground taken we would begin a major bombing campaign of nashville and other areas of strategic interest in order to cripple their response and demoralize their population into suing for peace.
war template by @CosmicMiracle thanks to @Mohibul17227 for the map pin idea is from @4DCMS18