Bring them down with artillery and manpower! Ramp up your sites with Frontier Settlers and Land Surveyor.

Use Gnome Hollows, Great Wall, Mountain Pass, and Perilous Bridge to create roadblocks to slow/prevent your opponent advancing into your territory.

Many of your sites can create tokens on entry. Combine this with Necromancer for a steady stream of recruits. Once you've established several sites across the middle of the board, leverage Border Militia, Raise Militia, and Guards! to gain large chunks of tokens.

Use those tokens, along with any leftover Frontier Settlers and Land Surveyors, to man the Siege Ballista, Corpse Catapult, and Payload Trebuchet. For the Trebuchet, throw I Am Colossus!, Midland Army, & Craterize for massive early damage or to secure Death's Door. Or play them if drawn later, this deck ramps rather quickly. The Catapult gives each dead minion a second use as extra damage.

An additional ranged package, for supplemental damage and control, includes Belmotte Longbowmen, Yourke Crossbowmen, Hunting Party, and Vantage Hills.

Protect your fragile army with Bailey & Shield Maidens. A copy of Tragedy Worrywart can also prove crucial against magic-damage control decks.

Sometimes you won't draw any artillery, or you'll need to rush in and damage sites/minions. House Arn Bannerman, Returned King, King of the Realm, & Drums of Doom turn your weak tokens into threats. Drums also turns anything fired with Ballistas, Trebuchets, and Catapults into a lethal shot (if nearby).

Bury is your non-combat removal package.

Common Sense lets you search up removal (Bury), token makers (Border Militia / Raise Militia), ramp (Land Surveyor), or ranged support (Belmotte Longbowmen).

Call to War provides additional toolboxing, searching up ramp (Frontier Settlers), protection (Shield Maidens / Tragedy Worrywart), power boosts (House Arn Bannerman), or ranged support (Yourke Crossbowmen / Hunting Party).

The deck splashes for Raise Militia, which only requires a single threshold. With 1/6 of your sites providing , you should end up with 1 or 2 during the course of the game. If not, throw any held copies of Raise Militia with Trebuchet.