27 Mar 1918 - 29 Mar 1918
29 Mar 1918 - 30 Mar 1918
30 Mar 1918 - 1 April 1918
1 April 1918 - 3 April 1918
2 April 1918 - 4 April 1918
4 April 1918 - 6 April 1918
6 April 1918 - 8 April 1918
7 April 1918 - 9 April 1918
9 April 1918 - 11 April 1918
6 June 1917 - 8 June 1917
11 April 1918 - 13 April 1918
12 April 1918 - 14 April 1918
14 April 1918 - 17 April 1918
16 April 1918 - 18 April 1918
18 April 1918 - 20 April 1918
20 April 1918 - 25 April 1918
22 April 1918 - 25 April 1918
24 April 1918 -27 April 1918
26 April 1918 - 28 April 1918
28 April 1918 - 30 April 1918
8 June 1917 - 9 June 1917
31 April 1918 - 2 May 1918