Merchant Shipping Losses, Allied

 

1914
British Allied
& Neutral
Total U-Boats Commissioned
August 44,692 18,075 72,767 3
September 89,251 9,127 98,375 3
October 78,088 9,829 87,917 1
November 9,348 10,065 19,413 2
December 26,815 17,382 44,197 2
Total 248,194 64,478 312,672 11

 

1915
British Allied
& Neutral
Total U-Boats Commissioned
January 32,276 15,705 47,981 2
February 36,372 23,549 59,921 4
March 71,768 9,007 80,775 7
April 24,383 31,342 55,725 6
May 89,673 30,385 120,058 8
June 91,315 40,113 131,428 6
July 57,274 52,366 109,640 5
August 151,354 34,512 185,866 2
September 102,135 49,749 151,884 2
October 54,156 34,378 88,534 2
November 94,655 58,388 153,043 2
December 74,490 48,651 123,141 6
Total 879,851 428,145 1,307,996 52

 

1916
British Allied
& Neutral
Total U-Boats Commissioned
January 62,645 18,614 81,259 3
February 75,928 41,619 117,547 5
March 99,696 67,401 167,097 9
April 141,409 50,258 191,667 8
May 64,722 64,453 129,175 9
June 36,976 71,879 108,855 8
July 85,228 32,987 118,215 9
August 45,026 117,718 162,744 10
September 109,263 121,197 230,460 10
October 177,386 176,274 353,660 12
November 170,409 141,099 311,508 13
December 182,728 172,411 355,139 12
Total 1,251,416 1,075,910 2,327,326 108

 

1917
British Allied
& Neutral
Total U-Boats Commissioned
January 155,686 212,835 368,521 10
February 316,964 223,042 540,006 4
March 357,064 236,777 593,841 5
April 551,202 329,825 881,027 5
May 353,737 242,892 596,629 5
June 419,267 268,240 687,507 8
July 367,594 190,394 557,988 11
August 333,052 181,678 511,730 20
September 196,457 155,291 351,748 8
October 276,359 182,199 458,558 13
November 173,647 115,565 289,212 5
December 253,500 145,611 399,111 6
Total 3,751,529 2,484,349 6,235,878 100

 

1918
British Allied
& Neutral
Total U-Boats Commissioned
January 180,348 126,310 306,658 3
February 227,582 91,375 318,957 6
March 199,751 142,846 342,597 9
April 215,784 62,935 278,719 9
May 192,938 102,582 295,520 11
June 163,629 91,958 255,587 9
July 166,004 130,963 296,967 9
August 147,257 136,558 283,815 8
September 137,001 50,880 187,881 10
October 59,229 59,330 118,559 12
November 10,220 7,462 17,682 2
Total 1,699,743 967,199 2,666,942 88
         
TOTAL 7830733 5050081 12,850,814 359

 

Source: John Ellis & Michael Cox, The World War I Databook.