U.S. - Japanese Tensions

The USJT level in a Global War game determines when the U.S. may declare war on Japan, as well as the rate of American rearmament and the economic and strategic involvement of the U.S. in the Pacific prior to U.S. entry. The recording of the USJT level begins in Fall 1939. A cumulative total of USJT is kept. Generally the USJT level will rise, but certain events may reduce the USJT level. The USJT level begins at zero.

Die Roll to Determine Effective Tension Level
The actual USJT level is modified by the roll of one die to determine the effective USJT level for the ensuing Allied player turn: die roll of 1: -2; die roll of 2: -1; die roll of 3 or 4: no effect; die roll of 5: +1; die roll of 6: +2. The die roll is made at the end of each Allied diplomatic phase (EXCEPTIONS: If Japan declares war on Britain without declaring war on the U.S., the die roll is made immediately, rather than at the end of the ensuing Allied diplomatic phase; if Japan declares war on the U.S., a final die roll is made immediately - 49.852).

Automatic Modifier
This modifier is automatically implemented at the start of each game turn, to reflect the fundamental differences between the Tripartite powers and the U.S.
+1Each game turn, including Fall 1939.

Diplomatic Modifiers
DPs may not be placed in USJT.

Status Modifiers
Status modifiers are implemented each game turn, beginning in Fall 1939. The modifiers for Germany and the U.S. being at war and both Germany and Japan being at war with Russia are determined by the situation at the start of each game turn; the remaining status modifiers are triggered if the indicated situation exists at the start of a turn or arises in the course of a turn.
+1If Germany and the U.S. are at war.
+2If both Germany and Japan are at war with Russia.
+1For each Japanese mobilization, not counting the Japanese Fall 1939 mobilization or any Japanese mobilization that occurs after Japan declares war on the U.S. (for a maximum of +3 per turn).
+1If an oil embargo against Japan is in effect.
+1If Japanese units are in French Indochina except for the two northern hexes.

Event Modifiers
Event modifiers are implemented only when the indicated event occurs. Event modifiers based on the capture or control of territory are negated if the territory in question is recaptured, and apply again if the territory changes hands a second time.
+#For the first Japanese shipbuilding increase: +1; for the second: +2; for the third: +3; and so on.
+1For each three-factor or larger named ship launched by Japan.
+1For each fortification built by Japan.
+1For every 15 Japanese BRPs spent on offensive operations each turn. A remnant of eight or more BRPs at the end of the Japanese player turn triggers an increase; a remnant of seven or fewer BRPs is ignored.
+1Japanese air units bomb China or the India or Australia box.
+2Japanese declaration of war against Russia.
+4Japanese declaration of war against Britain.
+2Axis capture of Paris.
+5If Britain surrenders.
-2Russian declaration of war against Japan.

Post-U.S. Election Status Modifiers
The following modifiers are implemented only at the beginning of each game turn after a U.S. election result favoring the Axis.
+1For each major power other than the U.S. at war with Japan.
+1If Australia has surrendered.

Results are implemented as indicated. Results are not negated by a subsequent drop in the USJT level.
3Limited aid to China endorsed by Congress - the U.S. may grant five BRPs each turn to China.
8The U.S. must deploy the Pacific Fleet, two AAF and three additional infantry factors from the U.S. to Pearl Harbor.
10The U.S. mobilizes 20 BRPs of units (no later than Winter 1940).
14Increased aid to China wins Congressional approval - the U.S. may grant ten BRPs each turn to China.
20The U.S. mobilizes 20 BRPs of units (no later than Summer 1941). Military aid to China authorized. China adds one AAF to its force pool (the Flying Tigers). The U.S. may deploy one air transport factor from the U.S. to India. The U.S. may impose an oil embargo on Japan (33.45211).
26The U.S. may deploy two AAF from the U.S. to Lingayen (Philippines). The U.S. may leave these two AAF in the U.S.
30The U.S. mobilizes 20 BRPs of units (no later than Winter 1941), then mobilizes in each of the next nine turns.
35A second Flying Tiger AAF is added to the Chinese force pool.
37The U.S. may deploy an additional three infantry factors to any American-controlled territories in the Pacific.
40American forces in the Far East put on alert. The Western Allies may construct fortifications. The U.S. and Britain may place airbases. The U.S. and Japan may accelerate or defer Pacific naval construction (27.7272B, C). The U.S. may deploy one Western Allied ASW per turn to the Pacific SW box. Japanese and American submarines may deploy to the Pacific SW box.
45The U.S. may ignore deployment limits in the Far East and redeploy whatever forces it wishes to areas it controls.
50U.S. declaration of war against Japan allowed.

The Pacific Fleet
The U.S. Pacific Fleet consists of the Enterprise (CV), Saratoga (CV), Lexington (CV), Arizona (3), California (3), Maryland (3), Nevada (3), Oklahoma (3), Pennsylvania (3), Tennessee (3), West Virginia (3), CA14, DD12 (two of which begin the game in Pearl Harbor), plus all other naval units in the Pacific theater when Japan and the U.S. go to war. When the USJT level reaches 8, the U.S. must transfer the Pacific Fleet to Pearl Harbor.

Once transferred to Pearl Harbor, the Pacific Fleet may not be withdrawn and may only leave Pearl Harbor when the USJT level reaches 45 or war breaks out between Japan and the U.S. Additional naval units are assigned to the Pacific fleet if they are NRed to the Pacific from the Atlantic or built in the Pacific U.S. box and not immediately NRed to the Atlantic. Additional naval units assigned to the Pacific fleet must remain with the Pacific fleet until the Pacific fleet is permitted to leave Pearl Harbor.

Japanese mobilizations
Japan mobilizes 20 BRPs of units in Fall 1939. Japan is free to trigger its three remaining mobilizations when it likes, subject to the restriction that Japan must match the first three American mobilizations in the Pacific. Thus Japan may delay each mobilization until the corresponding American mobilization occurs, but must mobilize immediately, even during an Allied turn, when the effective USJT level reaches 10, 20 and 30 (36.11C).

When war breaks out between Japan and the U.S., Japan completes its mobilizations at the rate of one mobilization per turn until all remaining Japanese mobilizations have occurred.

American mobilizations
The rules relating to American Pacific mobilizations are set out in 36.11G. The effective USJT tension level is determined at the end of the Allied diplomatic phase, immediately after a die roll is made to determine the effective tension level for that turn (49.852A):

Each increase in Japanese or American shipbuilding is the equivalent of five BRPs of ground or air units.

Effect of a Japanese attack on Britain
A Japanese attack on Britain, but not the U.S., triggers the following effects:
A. At the moment Japan declares war on Britain, the USJT level immediately rises to 20 or by four, whichever yields the greater result. For the remainder of the turn in which Japan declares war on Britain, other USJT modifiers are applied normally. In each subsequent turn, all USJT modifiers are disregarded and the USJT level automatically increases by six at the start of each game turn.
B. American forces in the Far East are put on alert. The U.S. may ignore deployment limits in the Far East and deploy whatever ground and air forces it wishes in areas it controls. Both the U.S. and Japan may accelerate shipbuilding (27.7272B). These results do not affect the rate of American mobilization, which is based on increases in the USJT level.
C. Australia and all British-controlled territories on the Pacific front, other than New Guinea and British island groups which have been attacked by Japan, come under American control at the start of the Western Allied player turn immediately following the Japanese attack against Britain and may not be attacked by Japan until Japan and the U.S. are at war.

BRP grants prior to U.S. entry
BRP grants to China are allowed as indicated by the USJT level. BRP grants to Russia are not allowed until the U.S. has entered the European war. The permissible level of American BRP grants to Britain and France is determined by the USAT level.