Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
German submarine U-155 (1941)
Table title:
Summary of raiding history
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Date </th><th colspan=1 rowspan=1 > Ship Name </th><th colspan=1 rowspan=1 > Flag </th><th colspan=1 rowspan=1 > Tonnage </th><th colspan=1 rowspan=1 > Fate </th></tr>
<tr> <td colspan=1 rowspan=1 > 22 February 1942 </td><td colspan=1 rowspan=1 > Adellen </td><td colspan=1 rowspan=1 > United Kingdom </td><td class="highlighted"  colspan=1 rowspan=1 > 7,984 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 22 February 1942 </td><td colspan=1 rowspan=1 > Sama </td><td colspan=1 rowspan=1 > Norway </td><td class="highlighted"  colspan=1 rowspan=1 > 1,799 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 7 March 1942 </td><td colspan=1 rowspan=1 > Arabutan </td><td colspan=1 rowspan=1 > Brazil </td><td class="highlighted"  colspan=1 rowspan=1 > 7,874 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 14 May 1942 </td><td colspan=1 rowspan=1 > Brabant </td><td colspan=1 rowspan=1 > Belgium </td><td class="highlighted"  colspan=1 rowspan=1 > 2,483 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 17 May 1942 </td><td colspan=1 rowspan=1 > Challenger </td><td colspan=1 rowspan=1 > United States Navy </td><td class="highlighted"  colspan=1 rowspan=1 > 7,667 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 17 May 1942 </td><td colspan=1 rowspan=1 > San Victorio </td><td colspan=1 rowspan=1 > United Kingdom </td><td class="highlighted"  colspan=1 rowspan=1 > 8,136 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 20 May 1942 </td><td colspan=1 rowspan=1 > Sylvan Arrow </td><td colspan=1 rowspan=1 > Panama </td><td class="highlighted"  colspan=1 rowspan=1 > 7,797 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 23 May 1942 </td><td colspan=1 rowspan=1 > Watsonville </td><td colspan=1 rowspan=1 > Panama </td><td class="highlighted"  colspan=1 rowspan=1 > 2,220 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 28 May 1942 </td><td colspan=1 rowspan=1 > Poseidon </td><td colspan=1 rowspan=1 > Netherlands </td><td class="highlighted"  colspan=1 rowspan=1 > 1,928 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 30 May 1942 </td><td colspan=1 rowspan=1 > Baghdad </td><td colspan=1 rowspan=1 > Norway </td><td class="highlighted"  colspan=1 rowspan=1 > 2,161 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 28 July 1942 </td><td colspan=1 rowspan=1 > Barbacena </td><td colspan=1 rowspan=1 > Brazil </td><td class="highlighted"  colspan=1 rowspan=1 > 4,772 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 28 July 1942 </td><td colspan=1 rowspan=1 > Piave </td><td colspan=1 rowspan=1 > Brazil </td><td class="highlighted"  colspan=1 rowspan=1 > 2,347 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 28 July 1942 </td><td colspan=1 rowspan=1 > Bill </td><td colspan=1 rowspan=1 > Norway </td><td class="highlighted"  colspan=1 rowspan=1 > 2,445 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 30 July 1942 </td><td colspan=1 rowspan=1 > Cranford </td><td colspan=1 rowspan=1 > United States </td><td class="highlighted"  colspan=1 rowspan=1 > 6,096 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 1 August 1942 </td><td colspan=1 rowspan=1 > Clan Macnaughton </td><td colspan=1 rowspan=1 > United Kingdom </td><td class="highlighted"  colspan=1 rowspan=1 > 8,088 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 1 August 1942 </td><td colspan=1 rowspan=1 > Kentaur </td><td colspan=1 rowspan=1 > Netherlands </td><td class="highlighted"  colspan=1 rowspan=1 > 5,878 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 4 August 1942 </td><td colspan=1 rowspan=1 > Empire Arnold </td><td colspan=1 rowspan=1 > United Kingdom </td><td class="highlighted"  colspan=1 rowspan=1 > 7,045 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 5 August 1942 </td><td colspan=1 rowspan=1 > Draco </td><td colspan=1 rowspan=1 > Netherlands </td><td class="highlighted"  colspan=1 rowspan=1 > 389 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 9 August 1942 </td><td colspan=1 rowspan=1 > San Emiliano </td><td colspan=1 rowspan=1 > United Kingdom </td><td class="highlighted"  colspan=1 rowspan=1 > 8,071 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 10 August 1942 </td><td colspan=1 rowspan=1 > Strabo </td><td colspan=1 rowspan=1 > Netherlands </td><td class="highlighted"  colspan=1 rowspan=1 > 383 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 15 November 1942 </td><td colspan=1 rowspan=1 > Ettrick </td><td colspan=1 rowspan=1 > United Kingdom </td><td class="highlighted"  colspan=1 rowspan=1 > 11,279 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 15 November 1942 </td><td class="highlighted"  colspan=1 rowspan=1 > HMS Avenger </td><td colspan=1 rowspan=1 > Royal Navy </td><td class="highlighted"  colspan=1 rowspan=1 > 13,785 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 15 November 1942 </td><td class="highlighted"  colspan=1 rowspan=1 > USS Almaack </td><td colspan=1 rowspan=1 > United States Navy </td><td class="highlighted"  colspan=1 rowspan=1 > 6,736 </td><td class="highlighted"  colspan=1 rowspan=1 > Damaged </td></tr>
<tr> <td colspan=1 rowspan=1 > 6 December 1942 </td><td colspan=1 rowspan=1 > Serooskerk </td><td colspan=1 rowspan=1 > Netherlands </td><td class="highlighted"  colspan=1 rowspan=1 > 8,456 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 2 April 1943 </td><td colspan=1 rowspan=1 > Lysefjord </td><td colspan=1 rowspan=1 > Norway </td><td class="highlighted"  colspan=1 rowspan=1 > 1,091 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 3 April 1943 </td><td colspan=1 rowspan=1 > Gulfstate </td><td colspan=1 rowspan=1 > United States </td><td class="highlighted"  colspan=1 rowspan=1 > 6,882 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 24 October 1943 </td><td colspan=1 rowspan=1 > Siranger </td><td colspan=1 rowspan=1 > Norway </td><td class="highlighted"  colspan=1 rowspan=1 > 5,393 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
</table>
Question:
How destructive was the U-155 submarine?
Answer:
U-155 sunk 26 ships totaling 126,664 gross register tons (GRT), and damaged one warship of 6,736 GRT.