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189The Road to Sedan
in search of coal and a mission. To be sure, the French navy had begun the
war with high hopes, determined to deal a decisive blow in the struggle with
Prussia. For this it was well-equipped. France’s 470 ship navy was second
only to England’sin1870, and nearly ten times the size of Prussia’s. The large
number of French hulls permitted Napoleon III to maintain a global empire
that stretched from Vietnam to Martinique. For war with another great power,
he relied on his forty-five ironclad battleships, frigates, and floating batteries.
The Prussians, latecomers to sea power, had only five ironclads to guard a
600-mile coast, their new naval base at Wilhelmshaven, and flourishing ports
at Bremen, Hamburg, L
¨
ubeck, Rostock, Stettin, Danzig, and K
¨
onigsberg.
15
Initially, Napoleon III had planned to use his fleet to land a corps of
infantry – 9,000 marines and 20,000 reservists – on the Prussian coast. Forty-
eight-year-old Prince Jer
ˆ
ome-Napoleon had been talked about as the probable
commander of the expedition, with General Louis Trochu as his staff chief
and, in view of the prince’s reputation as a tyro, his “mainspring.”
16
These
troops, even under Jer
ˆ
ome-Napoleon’s command, posed a substantial threat.
Militarily, Prussia relied on swift communications for its deployments, but
found many of its critical roads and railways within striking distance of the
sea. The French navy noticed this; among the files of Admiral Martin Fouri-
chon, commander of France’s North Sea squadron in 1870, is a North German
railway map given to him by the French naval minister in August 1870. The
minister had traced the following railroads in red ink: Memel-K
¨
onigsberg-
Berlin, Stettin-Berlin, Stralsund-Berlin, Flensburg-Hamburg, and Bremen-
Hanover.
17
The import was plain enough: If France’s “siege fleet,” fourteen
flat-bottomed ironclad batteries with heavy guns, could nose along the Ger-
man littoral shelling the ports and French marines could fight their way on to
Germany’s strategic railways, Moltke would have to modify his plan of cam-
paign and make big troop detachments for coastal defense. In July, French
agents had approvingly noted Prussian plans to deploy no less than 160,000
troops to the seacoast. The Junkers were particularly worried that the French
would pour troops into Pomerania to raise the Poles against the Germans.
18
Economically, Prussia’s expanding population and industry relied heavily
on imports and exports, so heavily that the cash-strapped Prussian war min-
istry had spent 10 million talers ($120 million today) on coastal defenses in the
two years before the war. Seven hundred ships tied up every day at a big har-
bor complex like Rostock-Warnem
¨
unde; any blockade of these ports would
jolt the German economy and slow the import of essential raw materials.
19
15 “St
¨
arke der franz
¨
osischen Marine,”
¨
Osterreichische Milit
¨
arische Zeitschrift (
¨
OMZ) 4 (1867),
p. 114. Lawrence Sondhaus, Preparing for Weltpolitik, Annapolis, 1997, pp. 92–6.
16 PRO, FO 27, 1807, Paris, 26 July 1870, Col. Claremont to Lyons.
17 Vincennes, Archives Centrales de la Marine (ACM), BB4, 907, Paris, Aug. 1870, Liebenows
Eisenbahnkarte von Nord-Deutschland, Adm. Rigault to Adm. Fourichon.
18 SHAT, Lb 4, Strasbourg, 1 Aug. 1870, Capt. Jung to Marshal Leboeuf.
19 ACM, BB4, 907, 7 July 1868, “Les ports de guerre de l’Allemagne du Nord.”