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:
52nd Infantry Regiment (United States)
Table title:
Vietnam
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Arrival Date </th><th colspan=1 rowspan=1 > Base Camp </th><th colspan=1 rowspan=1 > Forward Location </th><th colspan=1 rowspan=1 > Major Command </th><th colspan=1 rowspan=1 > Notes </th></tr>
<tr> <th colspan=5 rowspan=1 > 1st Battalion, 52nd Infantry Regiment Arrived in Vietnam on 10 February 1968 </th></tr>
<tr> <td colspan=1 rowspan=1 > February 1968 </td><td colspan=1 rowspan=1 > Chu Lai </td><td colspan=1 rowspan=1 > Chu Lai </td><td colspan=1 rowspan=1 > 198th Light Infantry Brigade </td><td colspan=1 rowspan=1 > Light Infantry Role </td></tr>
<tr> <td colspan=1 rowspan=1 > November 1968 </td><td colspan=1 rowspan=1 > Tam Ky </td><td colspan=1 rowspan=1 > Tam Ky </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > December 1968 </td><td colspan=1 rowspan=1 > Chu Lai </td><td colspan=1 rowspan=1 > Chu Lai </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > February 1969 </td><td colspan=1 rowspan=1 > Chu Lai </td><td colspan=1 rowspan=1 > Chu Lai </td><td colspan=1 rowspan=1 > 23rd Infantry Division (United States) </td><td colspan=1 rowspan=1 > Light Infantry Role </td></tr>
<tr> <td colspan=1 rowspan=1 > December 1969 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Dong Le </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > April 1970 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Long Phu </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > August 1970 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Trung Canh </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > September 1970 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > My Son </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > November 1970 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Tri Binh </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > December 1970 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Chu Lai </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > August 1971 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > The Loi </td><td colspan=1 rowspan=1 > 11th Infantry Brigade </td><td colspan=1 rowspan=1 > Light Infantry Role </td></tr>
<tr> <th colspan=5 rowspan=1 > Battalion DEROS at end of October 1971 </th></tr>
<tr> <th class="highlighted"  colspan=5 rowspan=1 > Company C, 52nd Infantry Regiment Arrived in Vietnam on 1 December 1966 </th></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > Saigon </td><td colspan=1 rowspan=1 > Saigon </td><td class="highlighted"  colspan=1 rowspan=1 > 716th Military Police Battalion </td><td class="highlighted"  colspan=1 rowspan=1 > Unit had Rifle Security role supporting the Military Police </td></tr>
<tr> <th colspan=5 rowspan=1 > Company C, 52nd Infantry Regiment DEROS 15 August 1972 </th></tr>
<tr> <th colspan=5 rowspan=1 > Company D, 52nd Infantry Regiment Arrived in Vietnam on 26 November 1966 </th></tr>
<tr> <td colspan=1 rowspan=1 > 26 November 1966 </td><td colspan=1 rowspan=1 > Long Binh </td><td colspan=1 rowspan=1 > Long Binh </td><td colspan=1 rowspan=1 > 95th Military Police Battalion </td><td colspan=1 rowspan=1 > Unit had rifle security role supporting the military police </td></tr>
<tr> <th colspan=5 rowspan=1 > Company D, 52nd Infantry Regiment DEROS 22 November 1969 </th></tr>
<tr> <th colspan=5 rowspan=1 > Company D, 52nd Infantry Regiment Returned to Vietnam on 30 June 1971 </th></tr>
<tr> <td colspan=1 rowspan=1 > 26 November 1966 </td><td colspan=1 rowspan=1 > Qui Nhon </td><td colspan=1 rowspan=1 > Qui Nhon </td><td colspan=1 rowspan=1 > US Army Support Command, Qui Nhon </td><td colspan=1 rowspan=1 > Unit staffed the Security Facilities of Qui Nhon Depot the Port of Qui Nhon, and the Qui Nhon Army Airfield. </td></tr>
<tr> <th colspan=5 rowspan=1 > Company D, 52nd Infantry Regiment DEROS 26 November 1972 </th></tr>
<tr> <th colspan=5 rowspan=1 > Company E, 52nd Infantry Regiment Activated in Vietnam on 20 December 1967 </th></tr>
<tr> <td colspan=1 rowspan=1 > 20 December 1967 </td><td colspan=1 rowspan=1 > An Khe </td><td colspan=1 rowspan=1 > Roving </td><td colspan=1 rowspan=1 > 1st Cavalry Division </td><td colspan=1 rowspan=1 > Unit operated as a separate long range reconnaissance patrol company. </td></tr>
<tr> <th colspan=5 rowspan=1 > Company E, 52nd Infantry Regiment Inactivated in Vietnam on 1 February 1969 </th></tr>
<tr> <th colspan=5 rowspan=1 > Company F, 52nd Infantry Regiment Activated in Vietnam on 20 December 1967 </th></tr>
<tr> <td colspan=1 rowspan=1 > 20 December 1967 </td><td colspan=1 rowspan=1 > Various </td><td colspan=1 rowspan=1 > Various </td><td colspan=1 rowspan=1 > 1st Infantry Division. </td><td colspan=1 rowspan=1 > Unit operated as a separate long range reconnaissance patrol company. </td></tr>
<tr> <th colspan=5 rowspan=1 > Company F, 52nd Infantry Regiment Inactivated in Vietnam on 1 February 1969 </th></tr>
</table>
Question:
What were the duties of Company C during the Vietnam War?
Answer:
The company was a rifle security company assigned to 716th MP Battalion, which was providing security in the Saigon area.