Ageod WW1 Manual Cover.qxd

There are two grades for submarine warfare: Restricted and All-Out (or
Unrestricted).
Submarine warfare is resolved during the Interphase, with the following
sequence:
1. U-Boats launch torpedo attacks
2. Great Britain: loss of EP and NW
3. Escorts sink U-Boats
Starting Submarine Warfare
Germany must attempt and succeed in the “Submarine Warfare” Political
Action to start Restricted submarine warfare.
● Submarine warfare will be effective during the next Interphase. If the
political action is played in Winter 1914, submarine warfare will take
place in Spring 1915.
● Declaring submarine warfare has a negative political effect on neutral
countries.
● Once submarine warfare is declared, the German player may escalate
by declaring “All-Out” Submarine Warfare (it may even do so in the
same Interphase). The effects are more destructive, but the neutral
countries, especially the United States, will react more strongly.
23.2 Restricted Submarine Warfare
The very first Interphase with Submarine War fare has increased losses
due to surprise. During this Interphase the “All-Out” table modifier is used
(see next). Otherwise, the subsequent Interphases use the standard
Restricted Submarine Warfare rules.
U-boats Torpedoes
Germany rolls a D12 for the whole U-Boat submarine fleet. There are two
different sets of modifiers, depending on which submarine warfare is in
effect.
132 World War One: La Grande Guerre 1914-1918
● During Restricted Submarine Warfare, the EP losses are halved, and
the NW loss is reduced by 1.
● When Germany discovers the “U-boat” technology (a much
improved version of the U-boats), it receives a permanent +1 bonus
for Restricted warfare, and a permanent +2 bonus for All-Out
warfare.
● Entente may have the “Asdic” technology, which provides a -1 penalty.
23.3 All-Out (Unrestricted) Submarine Warfare
When the “All-Out” warfare is in play, the table modifier is two columns to
the right for subs (e.g. 1 U-boat will be shooting on the 3 column).
The new factor is that during All-Out warfare, the previous Interphase
losses may provide a bonus for the next Interphase.
● During All-Out warfare, Britain may organize “Convoys”, by
choosing the corresponding Political Action. This gives a variable
penalty to U-boats, depending on the number of escorting DDs,
DEs and CLs (this is a function of the ship-to-U-boat ratio: 1-1, 3-2,
2-1, etc).
23.4 Fighting the Submarine Warfare
It’s handled in a generic way, there are no real physical handling and move
on the map itself.
● The Central Powers build and assign U-boats to Strategic Warfare
● The Entente player may assign or reassign warships to “Escort”
duty, to protect the merchant ships. This concerns only “light”
warships: DD, DE and CL from Britain, France and the United
States. To do so, he has to send such “Escort” fleets in North Atlantic
or North Sea (anyway the closest possible to seas bordering Great
Britain) with the "Patrol" mission.
Result/ 1 2 3 4 5 6 7 8 9 10
U-Boats
0 -2|-1 -4|-1 -8|-1 -8|-1 -10|-1 -12|-1 -14|-1 -16|-2 -18|-2 -20|-2
1 -4|-1 -8|-1 -16|-2 -16|-2 -16|-2 -16|-2 -16|-2 -18|-2 -18|-2 -20|-2
2 -4|-1 -8|-1 -16|-2 -16|-2 -16|-2 -18|-2 -20|-2 -24|-2 -26|-2 -30|-2
3 -6|-1 -12| -1 -18|-2 -18|-2 -20|-2 -24|-2 -28|-2 -32|-2 -36|-2 -40|-3
4 -6|-1 -12|-1 -18|-2 -20|-2 -24|-2 -30|-2 -34|-2 -40|-3 -44|-3 -50|-4
5 -8|-1 -14|-1 -20|-2 -24|-2 -30|-2 -36|-2 -42|-3 -48|-4 -54|-4 -60|-5
6 -8|-1 -14|-1 -20|-2 -28|-2 -34|-2 -42|-3 -48|-4 -56|-4 -62|-5 -70|-6
7 -8|-1 -16|-2 -24|-2 -32|-2 -40|-3 -48|-4 -56|-4 -64|-5 -72|-6 -80|-7
8 -8|-1 -18|-2 -28|-2 -36|-2 -44|-3 -54|-4 -64|-5 -72|-6 -82|-7 -90|-8
9 -10|-1 -20|-2 -30|-2 -40|-3 -50|-4 -60|-5 -70|-6 -80|-7 -90|-8 -100| -9
10 -20|-2 -30|-2 -40|-3 -50|-4 -64|-5 -80|-7 -90|-8 -100| -9 -110| -9 -120|-10
11 -30|-2 -40|-3 -50|-4 -60|-5 -74|-6 -90|-8 -100| -9 -110|-10 -120|-10 -130|-11
12 -40|-3 -50|-4 -64|-5 -80|-7 -94|-8 -110| -9 -120|-10 -130|-11 -140|-11 -150|-12
13 -50|-4 -60|-5 -80|-7 -100| -9 -120 -10 -140|-11 -150|-12 -160|-13 -170|-13 -180|-14
14 -60|-5 -80|-7 -100| -9 -120|-10 -140|-11 -150|-12 -170|-13 -180|-14 -190|-14 -200|-15