Update 0.20

Release date: December 12, 2018. Officially called "Foundation Of War".

Promo Art

Battle Tanks
- Heaviest armor class in the game
- 5-man crew with the following roles
  - Gunner
  - MG Gunner
  - Engineer (Repair & Ammo loading)
  - Driver
  - Commander
Ballistic Rocket Super Weapon
- End game super weapons demand the highest level of team effort to achieve, requiring logistics, recon, and combat roles to all work together
- Rockets are capable of leveling entire towns, permanently changing the map
Mortar Emplacement House
- A fixed Mortar built on top of a house that can be used to directly target and fire at attackers during a siege
Safe House
- Special Garrisoned Houses in towns that act as support bases in the case of a siege
- Offers 3 Facilities
  - Operating Post - Provides a spawn point and a base connection for AI structures.
  - Radio Station - Provide map intelligence.
  - Artillery Shelter - Structure can only be destroyed from the interior
Sandbag Walls
- A taller and heavier version of the Sandbags structure that can be used to fortify large towns
Advanced Ammunition Factory
- A manufacturing plant for producing advanced ammunition types
New Tank Ammunition Types
- 40mm / 75mm
- Balanced effectiveness against all targets
- 40mm / 75mm Shrapnel
- Anti-personnel shell that shatters into a large number of deadly bullets
- 40mm / 75mm Armour Piercing
- Anti-armour shell that is designed to penetrate heavy armour
- 40mm / 75mm High Explosive
- Anti-structure shell that detonates a high yield explosive charge on impact

New Dynamic Camera system
- Zooms out when aiming far for a more strategic view of the battlefield
New Garrisoned Buildings
- New building types:
  - Lots of new house variations
  - Coal Plant
  - Train Station
  - Windmill
  - More!
- Garrisoned buildings now start as built structures that are neutral
- Garrisoned buildings now require Town Hall to be claimed before they can be built
- Garrisoned building “AI” windows can now be mounted by standing in the area marked as ‘X’ in the structure’s interior
- Destroyed version of Garrisoned buildings now leave behind a husk that can be used for high ground and cover
Radio backpack now automatically captures intelligence at the location of the player (similar to how the L.U.V. captures intelligence)
Facilities now lose between 5-10 upgrade parts when the owning structure is destroyed

Forts no longer contain Garrison Facilities
Field Artillery damage mitigation against small explosives increased by 13% so that it's consistent with other lightly armoured vehicles (e.g. Half-Track, Armoured Car, etc)
Radio Backpack cost increased from 100 to 150 (to reflect it's new functionality)
Light Tanks no longer have a critical spot (but location based forward/side/rear damaged still exists)
Additional Forts added to center mainland conquest regions on the vertical borders
Mortar Shell no longer requires technology unlock
Gun Turret Health increased by ~100%
Gun Turret armor now has high mitigation against all damage types including AP and HE
Sticky Bomb damage increased by 25%
Sticky Bomb now deals Anti-Tank damage type (no armor mitgation on HT, LT, AC, BT)
Tank Stop Tech Parts increased from 150 to 450
Garrisoned House Tech Parts decreased from 1000 to 600
Tank Stop, Garrison House, Metal Wall, and Binoculars locations have been moved on the Tech Tree
Anti-Tank Mines removed from game
Light Tanks no longer have a critical spot and glancing shots have been removed

Players sometimes spawn at an invalid location on the map after travelling to the Home Islands
Flash of green light that appears for a moment at dawn and nightfall on snow maps
If a player walks away from a vehicle, walks back, and re-enters is, there's a chance their input would get stuck until they relog
Entering any vehicle and then entering a CV will cause previous vehicle's icon is persist
When mashing Q and E entering a truck, player may enter a state where they can't move
Traveling across a region border in a vehicle at night removes the darkness overlay
Structures sometimes aren't removed when a build site is invoked, resulting in duplicate structures
Townhalls can sometimes drop items inside structure, making them impossible to pickup
Player mounted in Foxhole sometimes turns invincible after Foxhole is gone
Player can't drive vehicle after triggering "Door blocked" message
Non visible characters leave behind footsteps
Grenade trajectory doesn't display a red if throwing grenade flush to a wall
Player prompt displays 'Upgrade' for FOBs, when it should show '..to use" prompt
Cannot leave a squad if your name appears at the bottom of the F1 menu
Field Gun Artillery ammo does not appear on the explosives tab in the townhall
Endless Shore NE corner, there's a hole in the map boundary allows players to exit the play area
Grenade blast marks sometimes appear as pure black decals on Oarbrearker Isles

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Update 0.19	Update 0.21

Source

Foxhole Official Website. [1]