diff --git a/frontend/src/v2/features/ulam/components/element/mission-general-information-initial-form.tsx b/frontend/src/v2/features/ulam/components/element/mission-general-information-initial-form.tsx
index 2377ad2f..c174075b 100644
--- a/frontend/src/v2/features/ulam/components/element/mission-general-information-initial-form.tsx
+++ b/frontend/src/v2/features/ulam/components/element/mission-general-information-initial-form.tsx
@@ -4,14 +4,19 @@ import {
   FormikDateRangePicker,
   FormikMultiCheckbox,
   FormikNumberInput,
-  FormikSelect, Icon, IconButton, Size, THEME
+  FormikSelect,
 } from '@mtes-mct/monitor-ui'
 import { FieldProps, Formik } from 'formik'
-import React, { FC } from 'react'
+import { FC } from 'react'
 import { FlexboxGrid, Stack } from 'rsuite'
 import { useMissionGeneralInformationsForm } from '../../../common/hooks/use-mission-general-informations-form.tsx'
 import { useMissionType } from '../../../common/hooks/use-mission-type.tsx'
-import { MissionReportTypeEnum, MissionULAMGeneralInfoInitial } from '../../../common/types/mission-types.ts'
+import {
+  MissionReinforcementTypeEnum,
+  MissionReportTypeEnum,
+  MissionULAMGeneralInfoInitial
+} from '../../../common/types/mission-types.ts'
+import * as Yup from 'yup'
 
 export interface MissionGeneralInformationInitialFormProps {
   name: string
@@ -29,23 +34,42 @@ const MissionGeneralInformationInitialForm: FC<MissionGeneralInformationInitialF
   const { initValue, handleSubmit } = useMissionGeneralInformationsForm(name, fieldFormik)
   const { missionTypeOptions, reportTypeOptions, reinforcementTypeOptions } = useMissionType()
 
+  const generalInfoInitialSchema = Yup.object().shape({
+    missionReportType: Yup.mixed<MissionReportTypeEnum>().required('Type de rapport obligatoire'),
+    missionTypes: Yup.array().required('Type de mission obligatoire'),
+    dates: Yup.array().required('Date et heure de début et de fin obligatoire'),
+    reinforcementType: Yup.mixed<MissionReinforcementTypeEnum>().when("missionReportType", {
+      is: MissionReportTypeEnum.EXTERNAL_REINFORCEMENT_TIME_REPORT,
+      then: (schema) => schema.required("Nature du renfort obligatoire")
+    })
+  });
+
+
+
   return (
     <>
       {initValue && (
-        <Formik initialValues={initValue} onSubmit={handleSubmit}>
+        <Formik initialValues={initValue} onSubmit={handleSubmit} validationSchema={generalInfoInitialSchema} validateOnMount>
           {formik => (
             <Stack direction="column" spacing="1.5rem" style={{ paddingBottom: '2rem' }}>
               <Stack.Item style={{ width: '100%' }}>
-                <FormikSelect options={reportTypeOptions} name="missionReportType" label={'Type de rapport'} isLight />
+                <FormikSelect
+                  options={reportTypeOptions}
+                  name="missionReportType"
+                  label={'Type de rapport *'}
+                  isLight
+                  isRequired={true}
+                />
               </Stack.Item>
 
               <Stack.Item style={{ width: '100%', textAlign: 'left' }}>
                 <FormikMultiCheckbox
-                  label={'Type de mission'}
+                  label={'Type de mission *'}
                   name="missionTypes"
                   options={missionTypeOptions}
                   isInline
                   isLight
+                  isRequired={true}
                 />
               </Stack.Item>
 
@@ -67,6 +91,7 @@ const MissionGeneralInformationInitialForm: FC<MissionGeneralInformationInitialF
                       label={'Dates et heures de début et de fin du rapport'}
                       isLight name="dates"
                       withTime={true}
+                      isCompact={true}
                     />
                   </FlexboxGrid.Item>
 
@@ -83,6 +108,7 @@ const MissionGeneralInformationInitialForm: FC<MissionGeneralInformationInitialF
                   <Button
                     accent={Accent.PRIMARY}
                     type="submit"
+                    disabled={!formik.isValid || formik.isSubmitting}
                     onClick={async () => {
                       handleSubmit(formik.values)
                     }}