HOI4 Logbook

HOI4 Logbook adds a dedicated campaign overview window to Hearts of Iron IV.

It lets you compare countries across different regions and timeframes, inspect national statistics, and automatically record major world events throughout the campaign.

The mod is useful for:

• Normal campaigns
• Observer games
• Timelapses
• Alternate-history playthroughs
• After-action reports
• Comparing major powers
• Following individual wars and theatres

HOI4 Logbook is a standalone statistics and record-keeping mod. It does not remove the normal HUD or alter the map.

The Logbook is hidden by default.

1. Press Shift + Q to open Events and Decisions.
2. Find the HOI4 Logbook section.
3. Select Open HOI4 Logbook.

Use the same section to hide it again.

The window can be moved by dragging it with the mouse.

The Log page automatically records major events during the campaign.

Recorded events include:

• War declarations
• Capitulations
• Countries returning to a war
• Annexations
• Government changes
• Countries joining factions
• Countries leaving factions
• New factions being formed

Each entry includes the in-game date and the countries involved.

The Log supports:

• 30 pages
• 8 events per page
• Up to 240 stored events
• Newest events on Page 1
• Left and right page navigation
• Automatic removal of the oldest entries when full

The Log only records events that happen after the mod becomes active.

GENERAL

• Divisions
• Available manpower
• Deployed aircraft
• Ships
• Factories
• Surrender progress
• Casualties

INDUSTRY

• Total factories
• Civilian factories
• Military factories
• Dockyards
• Civilian factories available for construction
• Fuel stockpile

COMBAT

• Divisions
• Available manpower
• Fielded manpower
• Fielded tanks
• Surrender progress
• Casualties
• War status

War status is shown as Peace, At War or Capitulated.

NAVY

• Total combat ships
• Carriers
• Battleships
• Battlecruisers
• Heavy cruisers
• Light cruisers
• Destroyers
• Submarines
• Super-heavy battleships
• Convoys

AIR

• Total deployed aircraft
• Fighters
• Close air support
• Tactical bombers
• Strategic bombers
• Naval and carrier aircraft
• Reconnaissance aircraft

Carrier fighters and carrier close air support are included under Naval aircraft.

Transport aircraft are not included.

POLITICS

• Government ideology
• Faction membership
• Stability
• War support
• Political power
• Economy law
• Conscription law

Politics always shows the current situation.

RESOURCES

• Steel
• Oil
• Aluminium
• Rubber
• Tungsten
• Chromium
• Coal

Resources shows each country’s current surplus after domestic use and trade.

EQUIPMENT

• Infantry equipment
• Artillery
• Support equipment
• Trucks
• Trains
• Tanks
• Aircraft

Tank totals include standard tank equipment and tank-designer chassis.

Aircraft totals include legacy aircraft types and aircraft-designer airframes.

Use the upper pair of arrows to cycle between theatres.

Available presets include:

• Global Powers
• Europe
• Western Front
• Eastern Front
• Mediterranean
• North Africa
• East Africa
• Balkans
• Scandinavia
• Middle East
• China and Japan
• South-East Asia
• Pacific
• Americas
• Southern Europe
• Central Europe
• Atlantic
• South Asia and Indian Ocean
• South America

Each theatre uses a fixed list of relevant countries.

Use the second pair of arrows to change the timeframe.

LIFETIME

Shows the current absolute value.

THIS YEAR

Shows the net change during the current year.

THIS MONTH

Shows the net change during the current month.

THIS WEEK

Shows the net change during the current week.

Timeframe tracking can show:

• Factory growth
• Division gains and losses
• Manpower changes
• Aircraft gains and losses
• Tank gains and losses
• Ship and convoy changes
• Casualties during the selected period

Negative numbers represent a net loss or reduction.

Politics, Resources and Equipment always display current values.

When the Log section is selected, the timeframe controls become page controls.

HOI4 Logbook makes long campaigns easier to understand.

It can help answer questions such as:

• Which major power is building fastest?
• How many aircraft has a country gained this year?
• Which side is losing the most manpower?
• How many ships were lost this month?
• How quickly is industry expanding?
• Which governments and factions changed?
• When did a war, annexation or capitulation happen?
• How are countries within a theatre developing?

The Logbook can remain open while the game runs, making it useful for observers, timelapses and campaign monitoring.

Target version: Hearts of Iron IV 1.19.*

Designed as a standalone statistics and interface utility.

It should work with most gameplay, graphical and map mods that do not replace the same interface or script systems.

Do not use HOI4 Logbook alongside the Timelapse 1.19 mod. Both use the same statistics system and may create duplicate interface elements, scripts or variables.

Total-conversion mods may not be fully supported if they:

• Replace standard country tags
• Add custom strategic resources
• Add non-standard equipment types
• Restructure the interface
• Replace Events and Decisions

Theatre lists use predetermined countries, so newly created or heavily modified nations may not appear in the expected theatre.

Starting a new campaign with the mod enabled is recommended for complete event and timeframe tracking.

This mod uses scripted effects, on-actions and interface systems.

It is not achievement compatible and changes the checksum.

• English
• Simplified Chinese

Simplified Chinese localisation is built directly into the main mod and loads automatically when Hearts of Iron IV is set to 中文.

Chinese translation provided by zero.

14/07/2026

• Added complete built-in Simplified Chinese localisation
• Chinese localisation now loads automatically when the game language is set to 中文
• Translation provided by zero
• Corrected Chinese world-event localisation formatting

13/07/2026

Initial release.

• Added the draggable HOI4 Logbook window
• Added General, Industry, Combat, Navy and Air statistics
• Added Politics, Resources and Equipment sections
• Added 19 theatre presets
• Added lifetime, yearly, monthly and weekly tracking
• Added automatic world-event recording
• Added actual in-game dates
• Added 30 Log pages
• Added storage for up to 240 events