to ^hom the Medical Department has furnished attendance on many 
occasions. 
* • ‘ ‘ ? j *> . ' * r v f t J , ' ' • ■ • f . 
V : 4 • • ‘ ; ,V'i • '•* . - ■ ’ i * ' • * * • • • ‘ . '■ * \ • , V \ Y/ . ' • • ■ ‘ 1 * 
The duties of troops in the Department have varied greatly in 
different localities. In the First, Second and Fourth Brigades 
they have consisted mainly in police work, while in the Third 
Brigade there has been constant and arduous field service, resulting 
. 
recently in the surrender of the insurgent leader ar the complete 
annihilation of his forces. The method adopted in this campaign 
'*V7. Yt • ' ■ . - ' ■ _ < "‘‘■A'-- • V t 'YY~ - ' -Y- •S’-f* ? ,‘ : .j. f Y*'-.. 
was novel in the history of American arms, consisting in an appli- 
v I - . .. i-» Vl.wf■>?_ _ V * ' - . ■ ■ . . - ■ .i 
» - - ' ’. . . . • 
cation of the principle of reconcentration of the inhabitants of 
the provinces in which the campaign occurred, in order to cut off 
completely the enemy's supplies. The natives living in certain 
zones were moved into designated towns where they were kept under 
strict surveillance. They were well fed and well housed,living 
under far better hygienic conditions than when in their own homes. 
To prevent an outbreak of small-pox among them, with consequent 
menace to our own troops, an order was issued by the Brigade 
Commander on January 16,1902 directing general vaccination of all 
natives in the towns of concentration. This was carried out 
under the direction >f the medical officers of the 28 adjacent 
military stations. The Insular Board of Health furnished the 
vaccine and 80 native vaccinators. Hospital Corps men and soldiers 
of the line were also utilized for this, work. By these means 
nearly 300,000 natives were vaccinated within a period of two months 
- VT ‘ * 
In many places there was no ice and the vaccine rapidly deteriorated 
